Volume 12 (1866) (428 pages)

88 Ghee Blining wul Sciewtitic Press. Mining and Scientific Press, Seton Epitor. G. W. M. SMITH. W. 5B. EWER “ A. DEWEY. DEWLEY & CO., Publishers. Qrrice—No. 505 Clay street, corner of Sansome, 2d floor. Terms of Subscriptions Oné copy, per anonm, in advance,. One copy, six months, In advance, . on bay For sale by Carriers and Newsdealers .@a It is Impossible for editors to know su, the merits and demerits of thelr correspondence, consequentl: the Feadcr must not receive the opinions of our contributors as ourojvn, Intelligent discussion is Invited upon all sides and the evidence of any error which may appear will be re ceived ln friendsbip and treated with respect. American and Boa Putents.—Lotters Patent for Inventors can be secured inthe United States and foreign countries through tho Mining anp Screntiric Press PATENT Acaney. We offer applicants reasonable terms, and they can rest assured of a strict compliance with our obligations, and afaithful performance of-all contracts. For reference, we wiil furnish the names of numerous parties for whom we have obtained patents during the past two ycars. . Favorable to Inveators.—Persons holding new Inyeutions of machIncry and important improvements, can have the saruc illustrated and explaincd in the Mining AND Scienriric Press, free of charge, lt in onr judgment the discovery is onc of real merit, and of sufficient interest to our readers to warrant publication. Payment in Advzunce.---This paper wlll not be sent tosubseribers beyond the term paid for. The publishers well know that agood journal canuot be sustained on the credit system. Mr, Vm. KR. Bradshaw, is our Special Correspond_ ent and Traveling Agent. All favorsor assistance rendered him in his progress through tbe country in behalf of our journal, will be duly acknowledged. San Francisco, Jan 1st, 1866. Mr. A. C. Kuox, ls our fully authorized Traveling Agent, and all subscriptions, or other favors extended to him, will bo duly acknowledged at thts office. San Francisco, Jaén 1th, 1866. ' San Francisco: Saturday Morning, Feb. 10, 1866. Endorsement by the. Miners’ State Convention. The following resolution was adopted by tho California Miners’ State Convention, held at Sacramento, Jan. 17th, 1866. Resolved, That we regard a mining paper or Journal of great importunce to the mining interest of Califoruia, and ‘worecominend the Mining ano Scientirie Press, of San Francisco, to the consideration and support of the ininers of the Pacific coast. Srecivens Recutvep— We acknowledge the receipt of some specimens of steatite and hydrated silicate of magnesia, each carrying coarse gold in considerable quantity. They are from the mines of W. B. Brink, located at Horse Creek, below Drytown. The specimens are very interesting, and well worthy of a careful study and examination, which tbey will receive. We shall take an early opportunity to report farther from them. Onr Stnckton correspondent, who recently furnished us a package of specimens for examinatinu, will please excuse our delay in attending tothem. We mnst plead other and pressing engagements ; hut his request shall he complied with soon. The specimens sent are prohably a variety of the mineral known as “turqoois,” containing a larger quantity of copper than usnal. This mineral contains a notable amonnt nf phosphoric acid ( PO5)— from 25 to 40 per cent. of its weight—which is prohably the chief cause nf the difficulties enconntered by ovr correspondent. We shall endeavor tn give it a more thorongh examination and report further atan early day. Perroteum.—Mr. J. R. Johnson, of Santa Clara, informs us that they are obtaining a similar class of petrnleum-hearing mineral to that descrihed hy Prof. Fleury, in a letter which was noticed at considerable length in our issne of Decemher 23d. This snbstance is fonnd appearing upon the surface, at intervals, for a distance of fifteen miles, commencing at the Santa Clara Works, and extending thence through Pescadero to a point below San Gregasis. Steps are being taken for its thorough exploration. We have been promised a sample of this mineral, from which we may be able to form an approximate judgment with regard to its identity in character with that of snch nndoubted value fonnd near Mecca, in the State of Ohio, and extending thence overa large tract of country. Goat Istanp, in nor harhor, is not as barren as is generally supposed. The Oakland News asserts that it possesses several fine springs and much atahle soil. * QUARTZ MINING IN IDAHO. ADVANTAGES OF CALIFORNIA-MADE MACHINERY— IMPORTANCE OF THE NORTHERN TRADE. Among the passengers for the Fast, by the steainer, was Mr. William R. De Frees, of Idaho. Mr. De Frees is one of the pioneér quartz mivers of that Territory. After a pretty thorough schooling in California and Nevada, he concluded to try a new field, and started for Idaho, where he found the prospects so Slattering that in the fall of 1864 he started for the East, via San Francisco, to interest some of his friends in the development of his newly found mines. His trip was successful, and in the spring of the sncceeding year he left Cbicago with a mill, which he took overland to the scene of his proposed operations. Eleven other mills were started ont by other parties— all for Idaho. By stint of superior management, or good Inck, or hoth, Mr. De Frees got his machinery through in time to put it np the same season—and he was the only party of the round dozen that did so; the eleven other mills heing obliged to lay over the entire winter, did not get into operation until about twelve months after that hronght out by Mr. De Frees. Notwithstanding his good success in this instance, he informs us that he doesnot intend to try the experiment again ; his experience is decidedly against hringing machivery across the plains either for Idaho or Montana. In the first place he prefers to have his machinery made where all the latest improvemeuts can be adapted, up to the latest hour, and hy mechanics who are personally conversaut with the needs and peculiarities of our mines. No master mechanic who has never visited our mines and personally witnessed the operation of the various kinds of machinery in use there for hoisting, pumping, crushing, amalgamating and concentrating, is competent to design and construct machinery for such work. One of the greatest advantages whicb California fonndrymen and machinists have over those at the East in the construction of such machinery, grows out of the fact that they are personally conversant with the mines and the practical operations of mining machinery. bey acqniro this familiarity and knowledge by freqnent visits to the mines, anda careful examination of the working of their own, and the macbinery constructed hy otbers. They are thus enabled to remedy any defect which may he noticed, and are quick to perceive and suggest improvements. Then again, in fornishing machinery for any point in the State of Nevada, or the Territory nf Idaho or Montana, fully one year’s time is saved by purchasing here after the machinery is ready to leave the shop, in getting the same to work. For instance, a mill is ordered for either of those places, at a foundry in Chicago and another in San Francisco, each to be ready to start as soon as the roads are favorable in the spring. The one started from Chicago consumes the entire summer in reaching its point nf destination; and meets with extra‘. ordinary good fortune, if it escapes the necessity of wintering in some valley evén short of its destination. The one leaviug this city having the advantage of an earlier season, at the place of starting, is able to move out a month or six weeks sooner than its competitor ; reaches its destination, is put up and gets well into operation before tbe otber arrives upon the gronnd ; which, when it does arrive there, is compelled, by the severity of the winter in those high latitudes, to remain honsed, or perhaps entirely exposed to the weather, until late the next spring. In the meantime, if a good location has been made, tbe San Francisco mill has half or fully paid for itself. Both experience and; common sense teaches us that San Francisco is altogether preferable to auy Eastern city, as a place in which to order machinery fur any mines this side of Salt Lake, or even tothe westward of the Rocky Mountains. For the reasons above stated, Mr. De Frees advises those with whom he is associated at tbe Hast to send no more machinery overland ; aod he accordingly expects to have two, if not. three more mills awaiting his order in this city, on his return here next spring, which he will take with him to Idaho, to be put up on mines in the southern part of that Tetritory, not far from where his first mill is at work. + There are now eleven or twelve mills in actual operation in Idahd; and fifteen or sixteen more in process of construction. There will consequently he some twenty-five or eight mills in operation there next spring; which number will in all probability be very materially increased hefore another winter sets in. This is a pretty good showing -for a mining region so vewly opened. Twelve of these mills were hronght across the plains. WRecent acconnts from Idaho and Montana are full of promise for tbe fnture of those Territories as mining rections. What is now needed are facilities of communication hetween the mines and this. city, which is their natoral hase for snpplies. Great exertions are heing made,by Eastern . merchants to secnre this trade, the importance of which, within the next decade, to this city . or auy other which may secure it, can scarcely he estimated. Ifthe merchants and mechanics of San Froncisco allow it to slip from their hands they will lose a golden prize. Marquis’ Suior-Horrer.—Mr. John Margnis, of this city, has made application, through our Patent Agency, for a new and improved “ SlopHopper,” for sinks, cess-pools and drains, which may be described as follows: An ontside cylinder or hopper is placed in the viaduet, inside of which, at the bottom, is a pipe extending upwards, one or more inches, restiug upon arms; over this sets a double pan, made hy placing a piece of sheet-iron around a disk, forming a bottom and top flange, the lower flange. fitting loosely over the pipe, which extends up through the bottom of the hopper ; this forms the lower trap, by placing water around the space in the bottoin of the hopper. The lower flange of the donble pan, dipping into the water similar to that of a gasometer, the water can easily flow ont into the drain, but no effluvia, can return. At the top of the hopper, whith is of greater circumfereuce than the bottom, is placed a sheet of metal, or flange, similar to the above-described, which forms a space hetween it and the inner periphery of the hopper for water. Another hopper is placed in the one already described: extending downward into the upper bowl of the double pan. The upper portion of this double hopper, as well as tbe bottom, is perforated , admitting water into the upper and lower traps, thns forming a double-trapped hopper, and donbly guarded against the return of effluvia, while the adjnsted hopper affords a trap or receptacle for slops and the accumnlating dehris, which can he taken ont and emptied, withont polluting the atmosphere around, as the single or stationary hopper can he nsed without the adjustable one, and with as safe a gnarantee of freedum from bad air. p Improvements 1n Morr’s Doustz Reyotvine Piow.—In a late number of the Press we allnded to this truly ingeninus piece of mechanism as oneof great valne to farmers and rauchinen. Mr. Mott, the inventnr, has lately mude important improvements in the plow by shortening the swivel or connecting rod, also in the manner of constructing the heau with the staging and braces, so as to comhine efficiency and strength where great strain will he likely to take place. The improvement also relates to a new device for locking and unlocking, which operation can he performed with ease and dispatch while the team is uader headway. A vast nnmher of acres of side-hill land are uow lying idle for want of a proper implement with which to penetrate the soil sufficiently deep for good cultivation—and turn the furrows all in the same direction or down hill. Heretofore side-hill’ plows have heen cumbersome and unwieldy, and as difficult to ‘manage and draw asa piece of ordnance with caisson attached, but Mr. Mott’s improved plan combines lightness’ witb strength and easy draft, and we predict that by its use many a rood of untilled soil will he made to yield its increase. Mr. Mott has made application for letters patent throngh our Patent Agency. A Wasxoz ConcesTrator.—Mr. Edwards has exhihited, at the Gould & Curry works, a hew conceutrator, which is described by the Gold Hill News as follows: The tailings are fed into a large, shallow wooden howl, which has a motion intparted to it something like that given by Mexicans to their wooden pros» pecting bowls. In machines for actual working this bowl will he some seven feet in diameter, and will be lined with sheet copper, coated with mercury. Iu the céntre‘of the bowl is a hole, regulated by a gate or ‘slide, through which the snlphnrets dnd quicksilver will he discharged into a proper receptahle placed helow. It is calculated that ofe machiue will work ten tons of tuilings* per day-—. reducing the’ ten tous to ahout one ton. Whatever gold, silver oramalgam may he contained in the tailings will be caught and saved on the copper lining of the bowl, which can he cleaned off from time to time, while the snlphurets, not heing capable of heing thus retained, will’ be’ driven’ to the center of the howl, and then passing through the opening in the center, saved as above described. he inachinery hy ‘which the peculiar ‘ pauning ” motion is ifiparted to tle bow! is most ingenious. The tailings are fed into thé howl in snch a manner that they always fall upou the’edge of the bowl, which is most elevated whatever way it may toro. “ — Tur MemortAu:—We lay before our readers: to-day “ The: Memorial of the Miners of Cali. fornia” to the President and Congress of the United States. It is au able document, well wortby of its anthorship and the parentage of the five hundred menibers assembled in Conveution, as well as the commendation of the, thonaands of carnest miners throughout the: coast who will heartily indorse its seutiments. Considering the importance of having the memorial placed on record in our files, we have given it the first full publication in San Frapcisco, to the exclusion of other valuable matter already prepared for our columns. ee Mrcnantes’ Insmtute.—The annnal meeting of this society, held on ‘Thursday of lastweek, was well attended. Aunnal reports were received from the several Committees, which were read and referred to the Board of Direc; tors. Committee on the framing of a new Constitution, were discharged, by request. The Committee for secnring a proper hnilding lot’ for tbe association reported progress and were granted further time. ‘The ‘l'reasurer reported some over $8,000 in the treasury and on loans. In accordance with the nsual custom, a Committee was appointed to nominate officers for the approaching year, said committee to report at an adjourned meeting to be held on Tbursday evening next, Febrnary 15th. We hope a full attendance will be had and a good ticket nominated. ‘Ihe election occurs on Tuesday, March 6th. CorresponpENnce.—We have received several valuable commnuications this week, which will receive attention as scon as the crowded state of our file will permit. Among othera, we may mention a valuable paper from Prof. Rowlandsou, “ Notes on the Chief Gold Districts thronghout the World ;” “ Tbe ‘Tractory Cnrve and the Properties of Griuding Plates,” apparently an able,and well written article, by W. A. Goodyear, M: E.; “ Gold-Bearing Sulphurets and their Reduction,” hy Jolin Scott ; ““Ynba County Mines,” by M.; “ Resources of Siskiyou County,” by Prof. G. K. Godfrey. City Cornzce—MeratturcieaL Brancu.— This Cnllege has wisely adopted a new branch of iustruction,as will he observed by advertisenent in thisissue of our paper. The services of Mr. Thomas Price have fortunately heen secured to the enterprise, as Professor of Chemistry. We shall make farther mention of this subject. Pusuic Scuoor Lisrarins.—A bill recently introduced in the State Senate, by Mr. Hunt. of Santa Clara, provides that $10 per annum shall be set apart for every district by tbe Connty Superintendeuts, provided alike amonnt be subscribed by the residents of the district, for the purpose of secnring @ library.

88 Ghee Blining wul Sciewtitic Press. Mining and Scientific Press, Seton Epitor. G. W. M. SMITH. W. 5B. EWER “ A. DEWEY. DEWLEY & CO., Publishers. Qrrice—No. 505 Clay street, corner of Sansome, 2d floor. Terms of Subscriptions Oné copy, per anonm, in advance,. One copy, six months, In advance, . on bay For sale by Carriers and Newsdealers .@a It is Impossible for editors to know su, the merits and demerits of thelr correspondence, consequentl: the Feadcr must not receive the opinions of our contributors as ourojvn, Intelligent discussion is Invited upon all sides and the evidence of any error which may appear will be re ceived ln friendsbip and treated with respect. American and Boa Putents.—Lotters Patent for Inventors can be secured inthe United States and foreign countries through tho Mining anp Screntiric Press PATENT Acaney. We offer applicants reasonable terms, and they can rest assured of a strict compliance with our obligations, and afaithful performance of-all contracts. For reference, we wiil furnish the names of numerous parties for whom we have obtained patents during the past two ycars. . Favorable to Inveators.—Persons holding new Inyeutions of machIncry and important improvements, can have the saruc illustrated and explaincd in the Mining AND Scienriric Press, free of charge, lt in onr judgment the discovery is onc of real merit, and of sufficient interest to our readers to warrant publication. Payment in Advzunce.---This paper wlll not be sent tosubseribers beyond the term paid for. The publishers well know that agood journal canuot be sustained on the credit system. Mr, Vm. KR. Bradshaw, is our Special Correspond_ ent and Traveling Agent. All favorsor assistance rendered him in his progress through tbe country in behalf of our journal, will be duly acknowledged. San Francisco, Jan 1st, 1866. Mr. A. C. Kuox, ls our fully authorized Traveling Agent, and all subscriptions, or other favors extended to him, will bo duly acknowledged at thts office. San Francisco, Jaén 1th, 1866. ' San Francisco: Saturday Morning, Feb. 10, 1866. Endorsement by the. Miners’ State Convention. The following resolution was adopted by tho California Miners’ State Convention, held at Sacramento, Jan. 17th, 1866. Resolved, That we regard a mining paper or Journal of great importunce to the mining interest of Califoruia, and ‘worecominend the Mining ano Scientirie Press, of San Francisco, to the consideration and support of the ininers of the Pacific coast. Srecivens Recutvep— We acknowledge the receipt of some specimens of steatite and hydrated silicate of magnesia, each carrying coarse gold in considerable quantity. They are from the mines of W. B. Brink, located at Horse Creek, below Drytown. The specimens are very interesting, and well worthy of a careful study and examination, which tbey will receive. We shall take an early opportunity to report farther from them. Onr Stnckton correspondent, who recently furnished us a package of specimens for examinatinu, will please excuse our delay in attending tothem. We mnst plead other and pressing engagements ; hut his request shall he complied with soon. The specimens sent are prohably a variety of the mineral known as “turqoois,” containing a larger quantity of copper than usnal. This mineral contains a notable amonnt nf phosphoric acid ( PO5)— from 25 to 40 per cent. of its weight—which is prohably the chief cause nf the difficulties enconntered by ovr correspondent. We shall endeavor tn give it a more thorongh examination and report further atan early day. Perroteum.—Mr. J. R. Johnson, of Santa Clara, informs us that they are obtaining a similar class of petrnleum-hearing mineral to that descrihed hy Prof. Fleury, in a letter which was noticed at considerable length in our issne of Decemher 23d. This snbstance is fonnd appearing upon the surface, at intervals, for a distance of fifteen miles, commencing at the Santa Clara Works, and extending thence through Pescadero to a point below San Gregasis. Steps are being taken for its thorough exploration. We have been promised a sample of this mineral, from which we may be able to form an approximate judgment with regard to its identity in character with that of snch nndoubted value fonnd near Mecca, in the State of Ohio, and extending thence overa large tract of country. Goat Istanp, in nor harhor, is not as barren as is generally supposed. The Oakland News asserts that it possesses several fine springs and much atahle soil. * QUARTZ MINING IN IDAHO. ADVANTAGES OF CALIFORNIA-MADE MACHINERY— IMPORTANCE OF THE NORTHERN TRADE. Among the passengers for the Fast, by the steainer, was Mr. William R. De Frees, of Idaho. Mr. De Frees is one of the pioneér quartz mivers of that Territory. After a pretty thorough schooling in California and Nevada, he concluded to try a new field, and started for Idaho, where he found the prospects so Slattering that in the fall of 1864 he started for the East, via San Francisco, to interest some of his friends in the development of his newly found mines. His trip was successful, and in the spring of the sncceeding year he left Cbicago with a mill, which he took overland to the scene of his proposed operations. Eleven other mills were started ont by other parties— all for Idaho. By stint of superior management, or good Inck, or hoth, Mr. De Frees got his machinery through in time to put it np the same season—and he was the only party of the round dozen that did so; the eleven other mills heing obliged to lay over the entire winter, did not get into operation until about twelve months after that hronght out by Mr. De Frees. Notwithstanding his good success in this instance, he informs us that he doesnot intend to try the experiment again ; his experience is decidedly against hringing machivery across the plains either for Idaho or Montana. In the first place he prefers to have his machinery made where all the latest improvemeuts can be adapted, up to the latest hour, and hy mechanics who are personally conversaut with the needs and peculiarities of our mines. No master mechanic who has never visited our mines and personally witnessed the operation of the various kinds of machinery in use there for hoisting, pumping, crushing, amalgamating and concentrating, is competent to design and construct machinery for such work. One of the greatest advantages whicb California fonndrymen and machinists have over those at the East in the construction of such machinery, grows out of the fact that they are personally conversant with the mines and the practical operations of mining machinery. bey acqniro this familiarity and knowledge by freqnent visits to the mines, anda careful examination of the working of their own, and the macbinery constructed hy otbers. They are thus enabled to remedy any defect which may he noticed, and are quick to perceive and suggest improvements. Then again, in fornishing machinery for any point in the State of Nevada, or the Territory nf Idaho or Montana, fully one year’s time is saved by purchasing here after the machinery is ready to leave the shop, in getting the same to work. For instance, a mill is ordered for either of those places, at a foundry in Chicago and another in San Francisco, each to be ready to start as soon as the roads are favorable in the spring. The one started from Chicago consumes the entire summer in reaching its point nf destination; and meets with extra‘. ordinary good fortune, if it escapes the necessity of wintering in some valley evén short of its destination. The one leaviug this city having the advantage of an earlier season, at the place of starting, is able to move out a month or six weeks sooner than its competitor ; reaches its destination, is put up and gets well into operation before tbe otber arrives upon the gronnd ; which, when it does arrive there, is compelled, by the severity of the winter in those high latitudes, to remain honsed, or perhaps entirely exposed to the weather, until late the next spring. In the meantime, if a good location has been made, tbe San Francisco mill has half or fully paid for itself. Both experience and; common sense teaches us that San Francisco is altogether preferable to auy Eastern city, as a place in which to

order machinery fur any mines this side of Salt Lake, or even tothe westward of the Rocky Mountains. For the reasons above stated, Mr. De Frees advises those with whom he is associated at tbe Hast to send no more machinery overland ; aod he accordingly expects to have two, if not. three more mills awaiting his order in this city, on his return here next spring, which he will take with him to Idaho, to be put up on mines in the southern part of that Tetritory, not far from where his first mill is at work. + There are now eleven or twelve mills in actual operation in Idahd; and fifteen or sixteen more in process of construction. There will consequently he some twenty-five or eight mills in operation there next spring; which number will in all probability be very materially increased hefore another winter sets in. This is a pretty good showing -for a mining region so vewly opened. Twelve of these mills were hronght across the plains. WRecent acconnts from Idaho and Montana are full of promise for tbe fnture of those Territories as mining rections. What is now needed are facilities of communication hetween the mines and this. city, which is their natoral hase for snpplies. Great exertions are heing made,by Eastern . merchants to secnre this trade, the importance of which, within the next decade, to this city . or auy other which may secure it, can scarcely he estimated. Ifthe merchants and mechanics of San Froncisco allow it to slip from their hands they will lose a golden prize. Marquis’ Suior-Horrer.—Mr. John Margnis, of this city, has made application, through our Patent Agency, for a new and improved “ SlopHopper,” for sinks, cess-pools and drains, which may be described as follows: An ontside cylinder or hopper is placed in the viaduet, inside of which, at the bottom, is a pipe extending upwards, one or more inches, restiug upon arms; over this sets a double pan, made hy placing a piece of sheet-iron around a disk, forming a bottom and top flange, the lower flange. fitting loosely over the pipe, which extends up through the bottom of the hopper ; this forms the lower trap, by placing water around the space in the bottoin of the hopper. The lower flange of the donble pan, dipping into the water similar to that of a gasometer, the water can easily flow ont into the drain, but no effluvia, can return. At the top of the hopper, whith is of greater circumfereuce than the bottom, is placed a sheet of metal, or flange, similar to the above-described, which forms a space hetween it and the inner periphery of the hopper for water. Another hopper is placed in the one already described: extending downward into the upper bowl of the double pan. The upper portion of this double hopper, as well as tbe bottom, is perforated , admitting water into the upper and lower traps, thns forming a double-trapped hopper, and donbly guarded against the return of effluvia, while the adjnsted hopper affords a trap or receptacle for slops and the accumnlating dehris, which can he taken ont and emptied, withont polluting the atmosphere around, as the single or stationary hopper can he nsed without the adjustable one, and with as safe a gnarantee of freedum from bad air. p Improvements 1n Morr’s Doustz Reyotvine Piow.—In a late number of the Press we allnded to this truly ingeninus piece of mechanism as oneof great valne to farmers and rauchinen. Mr. Mott, the inventnr, has lately mude important improvements in the plow by shortening the swivel or connecting rod, also in the manner of constructing the heau with the staging and braces, so as to comhine efficiency and strength where great strain will he likely to take place. The improvement also relates to a new device for locking and unlocking, which operation can he performed with ease and dispatch while the team is uader headway. A vast nnmher of acres of side-hill land are uow lying idle for want of a proper implement with which to penetrate the soil sufficiently deep for good cultivation—and turn the furrows all in the same direction or down hill. Heretofore side-hill’ plows have heen cumbersome and unwieldy, and as difficult to ‘manage and draw asa piece of ordnance with caisson attached, but Mr. Mott’s improved plan combines lightness’ witb strength and easy draft, and we predict that by its use many a rood of untilled soil will he made to yield its increase. Mr. Mott has made application for letters patent throngh our Patent Agency. A Wasxoz ConcesTrator.—Mr. Edwards has exhihited, at the Gould & Curry works, a hew conceutrator, which is described by the Gold Hill News as follows: The tailings are fed into a large, shallow wooden howl, which has a motion intparted to it something like that given by Mexicans to their wooden pros» pecting bowls. In machines for actual working this bowl will he some seven feet in diameter, and will be lined with sheet copper, coated with mercury. Iu the céntre‘of the bowl is a hole, regulated by a gate or ‘slide, through which the snlphnrets dnd quicksilver will he discharged into a proper receptahle placed helow. It is calculated that ofe machiue will work ten tons of tuilings* per day-—. reducing the’ ten tous to ahout one ton. Whatever gold, silver oramalgam may he contained in the tailings will be caught and saved on the copper lining of the bowl, which can he cleaned off from time to time, while the snlphurets, not heing capable of heing thus retained, will’ be’ driven’ to the center of the howl, and then passing through the opening in the center, saved as above described. he inachinery hy ‘which the peculiar ‘ pauning ” motion is ifiparted to tle bow! is most ingenious. The tailings are fed into thé howl in snch a manner that they always fall upou the’edge of the bowl, which is most elevated whatever way it may toro. “ — Tur MemortAu:—We lay before our readers: to-day “ The: Memorial of the Miners of Cali. fornia” to the President and Congress of the United States. It is au able document, well wortby of its anthorship and the parentage of the five hundred menibers assembled in Conveution, as well as the commendation of the, thonaands of carnest miners throughout the: coast who will heartily indorse its seutiments. Considering the importance of having the memorial placed on record in our files, we have given it the first full publication in San Frapcisco, to the exclusion of other valuable matter already prepared for our columns. ee Mrcnantes’ Insmtute.—The annnal meeting of this society, held on ‘Thursday of lastweek, was well attended.. Aunnal reports were received from the several Committees, which were read and referred to the Board of Direc; tors. Committee on the framing of a new Constitution, were discharged, by request. The Committee for secnring a proper hnilding lot’ for tbe association reported progress and were granted further time. ‘The ‘l'reasurer reported some over $8,000 in the treasury and on loans. In accordance with the nsual custom, a Committee was appointed to nominate officers for the approaching year, said committee to report at an adjourned meeting to be held on Tbursday evening next, Febrnary 15th. We hope a full attendance will be had and a good ticket nominated. ‘Ihe election occurs on Tuesday, March 6th. CorresponpENnce.—We have received several valuable commnuications this week, which will receive attention as scon as the crowded state of our file will permit. Among othera, we may mention a valuable paper from Prof. Rowlandsou, “ Notes on the Chief Gold Districts thronghout the World ;” “ Tbe ‘Tractory Cnrve and the Properties of Griuding Plates,” apparently an able,and well written article, by W. A. Goodyear, M: E.; “ Gold-Bearing Sulphurets and their Reduction,” hy Jolin Scott ; ““Ynba County Mines,” by M.; “ Resources of Siskiyou County,” by Prof. G. K. Godfrey. City Cornzce—MeratturcieaL Brancu.— This Cnllege has wisely adopted a new branch of iustruction,as will he observed by advertisenent in thisissue of our paper. The services of Mr. Thomas Price have fortunately heen secured to the enterprise, as Professor of Chemistry. We shall make farther mention of this subject. Pusuic Scuoor Lisrarins.—A bill recently introduced in the State Senate, by Mr. Hunt. of Santa Clara, provides that $10 per annum shall be set apart for every district by tbe Connty Superintendeuts, provided alike amonnt be subscribed by the residents of the district, for the purpose of secnring @ library.