Volume 12 (1866) (428 pages)

1368 " = She Blining and Beieitifie Dress, ’ “4 yin riding Fffects ae Diferenty f Formed. Janieeis itely y jine intervenéd occa tbem. This}in practice, work. Tt . giles . in, vate” sehgeit avail sin Sire Practically Considered.” is not true; for the material to be ground varies from tbe . able or economized ,, ‘work. ” Tt 4g, ;now. evident, oe — ’ i one-hundredtb part, or less, to a ‘balf incb or more in the pans being. equally’ charged. in. alll “respects, vatdocat Sint ge . . ifthe flat muller: be revolved three times and the: trace “REPLY TO NUMBER’ ae OF Wei A. GOODYEAR, . tory muller twice, that each will grind the same amoun' , diameter. Such being tbe case, the fineness or coarser ne ee wie eneivEE AND'SHINING’ ENGINEER, oy ness of the material to be treated’ becomes an unayoid. (Giearly). Each will consume the same amount , ads 0} yuuimmung (icdiarronel Prem narte . o Oe cee oe able element.in our practical considerations., ie TOW; ,. . power, as grinders for: the, equal quantities ‘ground. * Bat, 1 »i-4 . i) it . this element be introddced in our considerations, and ne, . aSIDCS each, mullet, at the same’ time, acts as a Stirter “or! ; 3 te fur te. wat oe & 7 84it Yronnc? eet, a ae BYE. ai MRAM ‘ carrier, it is, _ plain, that, in this, capacity # ‘the “flat muller’ ° an ' ; my as i lg at 2 a tuie (oe. ae — nea: feo arms ae la = ane: . ess) a: tree times will consume three patts.of power, 7: { Risin oe i = . nity bei r at the wear a P ' 1* and t t ‘the. tractory muller revolving tice will , cone ; lo + Mussrs. Errors or tae Move Axo SCIENTIFIC fh * of the Plates will be, greater than nearer"the center. . sunié but'two parts‘of power, and hence, that there:is: -oPress: J see by your issue of May 12, 1866, that Mr. i Reason tells us that the opportunity is afforded in meas. gain of one: part of power in favor ‘of the: tractory, .” Goodyear’ issy ready to substitute tbe calumet ® for the “hatchet. He, however, shows ‘signs whicb be-~ ‘speak an ‘early peace, . A broad streak of light already a ie lal appears. on the horizon, and I question not “but that. i , p may, soon be said—, { “foraiedpan. tis me teetinmeraly oxy . a ure near] corresponding to the fineness or cdarseness of J pondi . Now, of the “whole” amouhit of power éxpended in _ the material, ‘and that, hence the form of the plates will © aoe if fifteen per ‘dank: Be Allowe d for The! ‘purposes of _ be changed accordingly, ‘that the plane plates ; will be-. stirring or carrying, the, was. or pulp, it follows tha ercome> cdnical at tbeir grinding surfaces. ‘Reason tells , _ there i is a. saving of seven and a half per,cent. of power, eM te oe ode Tel lhe us still: fartber, that the portions of Rid grinding plates , : “in favor’ of the tractory: formed: ‘pan over, the. planejor -moo . fi The.mormris up agein—the/dewy-morn, 3 to 7 dual o¥c ‘hear their centérs come, to a elose ground, jotnt,’,.and _ flat bottomed pane: Litho feo csuey . ait ar toni -yatome f With breath jall incense, and with cheek all: ‘bloom, ll tbat ‘the Pon hee iid love amily otra ceawae=aals Therefore): ‘on this, the éecond of Mer ‘Goodyear’s’ Laughing the ¢londs away with playful scorn, eri <_. “ “mdin’ ‘aud important points,” it! ‘Seems’ to me'that he ae peepee “a we And, living ag if earth contained, no, tomb, we ‘coming’ ‘smooth; and the’ material being thus prevented’ . ! firas' Wimself: ‘about’ in the: position’ or . predican ent ofa! ee, Goodyear « cavhigbly ieater Sie * from, éoming between, them at these* points, tbat’ ‘the ". certain character. in, the. “ Georgia , Scenes 7 fe wh a Guin a) t! lates wear awa, slow] and bence’ accomplish cof are could look but one, way, and that upward.” i ap _saccomplished:mathematician,I:can byt congratulate my-. _ De y Js LB 14 ial ptebable*begins, tevscauthdaheweat of all ra -*self to find: him indorsing, ‘almost'to” “the fullest, extent, 9 "atively. ui little grinding, effect, Aen naan tbings'” » fears.wassthat of “ lugging” v= Nh ” as ai subjectumligy my’ ‘deductions’ “relative! to the *“ properties’ ‘of grinding . whieh, reason tells us, practice con mms 0 tne tu est. ex -:. nathe discussion. ore NN © plates” Byer tbe! Scfswniric! Pause, “fake 950. 'be’ ob! tent. On this‘point : une authority of practical mechanics . opAgain, from a practical stand . point;"it, hag neal ei Jorg ae ibeerre . . is conclusive. ‘Now. in practice, as well as in theory, it shown that , the differénce in the’ grinding « effects’ of the serves 4 By 1 oa Ba 9 the above Te ge ee 2 te i plane and tractory formed « ‘pans 1s jgreater ‘than see ile, Gaetinie « i Randall V's_recapitul lation, PRs page, 269, t will bé séen’”. 2 ae =? i, formed acters Wotplaggs ons Ap termined by theory, hence the true per centage in prac_ that, we, ;nOWw agree . with, reference. ‘rst, to tbe mutual attains a by the, oe ks 2 icmcurve “4 face,” Phe hitherto : . . tice in favor of the tractory pan is greater than above, j a] rafts p ratios, for. entire Plates of equaleweights among them— quoted. These, things being so, how stands the, first. re shown. lee q qt s'selves; ‘and. second to the mutualiratios tor*ring plates Mr. Goodyear’s “main .and important points,” to-wit: Bat farther, let us look at the truthfulness and Pace P : ee. me om cability of tbis proposition:of Mr. Goodyear, viz: “lof equal weight among theinselves; but that we; still . “uniformity of vertical wear independent of the partic« Neither these ”’ (referring to the tractory, ‘aldoseontenn ” ? _vidisagvee a3"to the ratio betWeén entire. plates and ring“ ular form of. eer ? It is aes tbat Mr. Goad pan. of, certain ps roportions,) & ‘nor any other forms" pros ~ plates ‘of the sdme ce ee . ei ge rele’ is utterly. ae eee eX. m. 4 al fe “ves 1 “dice an increased gtinding effect ‘except at the expense i fis ogc cero Mm ers tang 4 Now’we' may well infer that in practice, the ISPTOr ite OP ig precisely proportional ‘amou of power, and we av Now on this, point, hy, reference to my first Feply"t to ‘portion in the distribution of pressure is much greater, eawObttt thigssame Regul qvith an i form, b pect tg ME Goodyear; it will ,be, found that I did not jpeg than in theory. ‘Now, if Mr, Goodyear, yvill carefully the weight or size of. the plates. uf ‘iff ‘é 1) Rs: tbe:weight of.tbe ring ,plate in any of the’ cases’ 7 hie ayn sr pbicng. une. ther ioe In the-first. place, this proposition is nob strictly itrue 5 ~-wecapitulated, equal to thatsof.!the entire plate. . It’ is E:G. he will readily pertelve ane Tdo iat De ii: bra \« for if the weight is 'increaséd, the: size of the muller‘is thus so expressed, both by word and formula, . : ¥, howequal distribution of pressure in plane and conical plates " heaton? $ be. . sae i trate ,-ever, Mr. Goodyear has succeeded,in, making this' point, 1 of uniform ,bardness. ‘bat proportion “was derived pa & ry" i in tbe muller. involves an increase in the hii t of the jvelearer td the public mind, I shall: be found “tbe, last in from ae entirely different state of facts, as clearly’ ga rim of the pan. we scant ny! EE cot oattémpting to pluck adaurel. from! his: brow.’ “Again, Mr. ’ 2 ears: aS a discussion of Plate-A, page els ye a age its ‘structure. Hence,:we: see that the.entire, weight of; 2 sayy a u Goodyear, after complaining that the metit of 5 errors . Let us now rhe my. proposition “ tbat the tractory! the ma¢ hine would :be greatly increased, tbe first cost oAvere! ‘not better ‘appreciated, and ‘after ” recoun 1. with eon ede naceillede ververiichhorcaroremehancithen would’ ‘also be increased, the freivht cost would 1 be ‘inMo vitleritcatistasti hi ib: thy t ‘. the flat ie conical pan of tb ee , oil ido the “creased, the cost of . ‘* setting up »” would be increased, — et ae ent t sat , ac ion, ov e su sequent y, corree e those ale 3 Pe les va s ¢) . and the ‘stibsequent cost atid inconveniences of Working _ CEEOTS « ‘and made his. whew “deductions to, conform . per7 samme i amount of Work“at a less expense 0 power.’ + yout He"inersased i coal ile “To the first pat ‘of this proposition, namely ci tectly: to those already. obtained, iby) the jauthor: of the “the tractory formed, pai Will do very much more work, “ Supplement to the Wheeler & Randall's Quartz’ Opthan either, the flat or conical pan’ of the'same weight,” _ grators) Hand . Book,” becomes highly. self:congr atula-y,. and of the proportions hitherto discussed, Mr. Goodyear, ; _tory,,and observes :., It will now be evidenity I'think, . fully accedes. .On page 291,’he says: “The tractory py both, from what ;T :haye. said, and , from, Mi, ‘Randall’s , ‘ “conoid: does produce a greater effect i ve a ingle PRE anda ithousaiid ; and dne other gimer dicks, would dishonor, dmissions; that the Hi a: Book: adi Pacasle) Uy MT iti: Mei Cone taares Nor, as ‘td the . at icht, thi invention, of Mr. Good: éar. a own. admissions; thatstbe:Hand Book contained in. printmeasure of this effect, ag theoretically’ determined by us ‘(}:7" 4 a sere « This will never do. Quartz miners and operators, who, with: Job-like., patience, have, endured »“.Rotary ‘Batteries,’ étellRoarers,”. “ Coneussion . Cencentra’ . tors,” . Dry. #, Awalgdmators” , 2 Seeret i*Processes,? “double and “Twila compound hyfaluting, compelexities, si eiple;as well as.ni.detail, suffidient errors and ‘fallacies’ both, do we disagree. Each .finds tbe relative cee : The € lements ‘of lightness, soubienlen a a and {to justly subject’ it to aiel ate as! ‘severe as ‘any tbat a _ effects of the sev eral (pans to be for—'. 01) te. uid bie eae 1 panakizeprarstors a9 rot bie they ee. have made.” si onl ae ‘Plane or flat hottomed..0.4 1.1852, * . “greater Perfection in the tractory’pan’tban in a any other © "Phig-is decidedly 'peffeghing, “af not altogether. anodest, . ; ae ad ee an 5 acrid . ree “offeréd to the 'public. © +l e= “ae ei and’ ‘brings to ‘tmirid ‘the’ fides! of ‘anotber. hero; equally i Te la ta fi im sercbcictin ns a L ra eh re eee ae inn direct Esp entitled ee at ‘special meri iets immed a . ratieved ‘ih ‘o the last part Q my proposition, namely, “and do': » between: ‘the tractory’ and conical pans, ‘arther than to Ou a a ne . ) the same amount of work: at a less expense of power,” ‘tp say that the: ratio, theoretically, ‘determined, does not self 0, his’ burden; ‘There is “Perey, . if ‘your Gathers he emphatically: objects. Now the manner of working i hold good ‘in ‘practice. io “That i in fact, the efficiency of the ol “do me any, /honor, 50.5, if net] Jet him kill the: mext™ these different formed pans,-is to put a: large amourit’ ‘of eonital is not,above that of the flat’ botiomed pan. :! The. F ., Perey himself” CE cis 8 mmr CE we tigen, Erato 1,500 or 2,000 pounds into ‘them; adding ‘suffi-’’. ' reason of this apparent discrepancy between theory and ‘L qi ty al had oe water'to it to “reduce it to a pasty consistency. —Ppractice, to no: little extent, arises from the “unsteady and -juzULet us: now turn-our attention to a’ more! ‘practical ‘Now if the muller be’ ‘raised, fr: om the, stationary plate, swinging motion of the conical muller having its’ réater, consideration of the properties of’ gritiding plates. $0 as not to gfind at ‘all, itis ‘evident that it requires an . base “upward. ‘That. is, the! muller wearing gene at its yd ‘Aor near, the.close of: my first reply to,,Mr. Good. . expenditure rae no little power to stir this mass and to! greater circumference and, ‘then, coming: to bear “almost years page 2 60, I remarked: “ What was claimed and. carry i around. Each revolution’ costs'some er entirely on its, lower, and smaller hase, seems to “ toss nidvelshedtan@ aires, iE the eedtely 4 a. ‘The cost’ of this power depends much upon ‘the ¢conabout and’ labor. like a. ship in & heavy sea,” without: d y tormed pan '}sistency ‘of thé’ mass treated, and the velocity of the . scarcé making a single knottoward the destined havens oowill do very’ ‘much more work tban ‘either the flat or . ° muller. On an’ average, it is probably not less than fif. / 448 consideration ‘of the foregoing ‘facts, it does ¢eemy ‘\eonicel 4 pan « of the sanie weight’; and’ I will now Nada, do ". teen ‘per cent. of the whole power, expended when’ the r. Goodyear to the contrary ndtwithstanding; that the ‘ “the; same a arhount of’ “work at a “Tess ‘ expense of’ poiver.” * . ee is let: down to a full’ weight or "grinding caAe pe ie Lean ‘peculiar advantages ¢ over the, “the > ete ‘flat bottomed and conical, in very many, res, ects. , seta en Mr. Sune ear. “denies the,’ ai or This frie ha is eal upon the opinions of ee, “ In conclusion, allow me’ to. an vas Pe of arco anc S2yis)On page, 291, fall Inechanics and. quartz operators. ‘But whbetber the . another,'and,say; ‘“ Among the feelings which at tbis p vat ‘or near the close of “his discussion ; “The errors, expenditure, comparatively, be ‘more or less than fifteen }"' moment fill my breast, not» the least isithat of regret at «into, which “it fell “myself, though, tbey affected: my, nu-,.;. .Pe, cent. of the entire power, matters not’ in this’ digcus© . the’ position ° in which” Mr. ‘ “Goodyear “has placed *‘merical ‘results, did not affect the, ynain and important ke ais autitent, for a ptespt purpose st yak shimeelts Ee does sad fds ie aye focal “The ate , Hat no 1 iderable amount o ower is expended for, . whi e@; has es ousei nds no basis in “mechanics points: upon which I insisted, and, upon which Mr, Ran-, . ; stirring .and carrying around the sk cal Rui. : ae fs trand:: practice, ah a succor, from, public sympathy, no dall, is! wrong, which: sages el A uniformity. « of, vertical Now tbe “unavoidable, conclusion is, tbat. the: pa vor: . . cheering” from a mining “community. He has.-no, nuiler, acts in two capacities: first, that of a grinder: . ' foothold on which to stand while he might display the and second, grinding effect. considered i in’ connection mith “ second, tbat i a stirrer or carrier.” Taking the relative . ‘powers of his acknowledged talents. Every thing be+ “power the only just standard’ of compari rinding effec s of the plane, or flat bottomed _pan, at . néatb his feet is hollow and treacherous. He is like'a jie a yh a parison.:; And my: moyagae and 'the grinding effects of the tractory formed . . ‘strongman struggling in a morass’: evéry. effort to ex«fist assertion that in this light the tractory conoid’ pos--pant at ‘1. 7778, (which"numbers are nearly in the ratio . tricate himself only sinks bim deeper and deeper. “gesses no peculiar advantages: remains undeniably triie.”*) ‘of two to thr ee)y as detérmined both by Mr. Goodycar “And I fear the resemblance may be carried still farther; From’ a theoretical stand point, both. Mr. Goodyear ’ ‘and! myself, let us see it’ my proposition ‘is not rigidly * T fear that no friend can safely come to his relief, that and myself hayediet eed, the properties of grinding and: practically true ‘that the tractory formed’ pan will . ‘'no one ¢an approach near euough to hold out a helping Mates as if they came in direct contact in all their a “do the same amount.of work as the plane or conical hand, without danger of, going down himself, also, into ‘in arta j or at mos that onl: la Bring! pan at a less <= Rense. of power,” Let there bé no mis_ wae bottomless depths ; of this Perbonion, bog. 4 8 P a t 1 a : at only, a. a layer of. niaterial’ tnji.),,, understanding, in reference to the, use, of the term 7 SAN: ‘FRANo1900, May 16, 1866.00.00) u: yes G3

1368 " = She Blining and Beieitifie Dress, ’ “4 yin riding Fffects ae Diferenty f Formed. Janieeis itely y jine intervenéd occa tbem. This}in practice, work. Tt . giles . in, vate” sehgeit avail sin Sire Practically Considered.” is not true; for the material to be ground varies from tbe . able or economized ,, ‘work. ” Tt 4g, ;now. evident, oe — ’ i one-hundredtb part, or less, to a ‘balf incb or more in the pans being. equally’ charged. in. alll “respects, vatdocat Sint ge . . ifthe flat muller: be revolved three times and the: trace “REPLY TO NUMBER’ ae OF Wei A. GOODYEAR, . tory muller twice, that each will grind the same amoun' , diameter. Such being tbe case, the fineness or coarser ne ee wie eneivEE AND'SHINING’ ENGINEER, oy ness of the material to be treated’ becomes an unayoid. (Giearly). Each will consume the same amount , ads 0} yuuimmung (icdiarronel Prem narte . o Oe cee oe able element.in our practical considerations., ie TOW; ,. . power, as grinders for: the, equal quantities ‘ground. * Bat, 1 »i-4 . i) it . this element be introddced in our considerations, and ne, . aSIDCS each, mullet, at the same’ time, acts as a Stirter “or! ; 3 te fur te. wat oe & 7 84it Yronnc? eet, a ae BYE. ai MRAM ‘ carrier, it is, _ plain, that, in this, capacity # ‘the “flat muller’ ° an ' ; my as i lg at 2 a tuie (oe. ae — nea: feo arms ae la = ane: . ess) a: tree times will consume three patts.of power, 7: { Risin oe i = . nity bei r at the wear a P ' 1* and t t ‘the. tractory muller revolving tice will , cone ; lo + Mussrs. Errors or tae Move Axo SCIENTIFIC fh * of the Plates will be, greater than nearer"the center. . sunié but'two parts‘of power, and hence, that there:is: -oPress: J see by your issue of May 12, 1866, that Mr. i Reason tells us that the opportunity is afforded in meas. gain of one: part of power in favor ‘of the: tractory, .” Goodyear’ issy ready to substitute tbe calumet ® for the “hatchet. He, however, shows ‘signs whicb be-~ ‘speak an ‘early peace, . A broad streak of light already a ie lal appears. on the horizon, and I question not “but that. i , p may, soon be said—, { “foraiedpan. tis me teetinmeraly oxy . a ure near] corresponding to the fineness or cdarseness of J pondi . Now, of the “whole” amouhit of power éxpended in _ the material, ‘and that, hence the form of the plates will © aoe if fifteen per ‘dank: Be Allowe d for The! ‘purposes of _ be changed accordingly, ‘that the plane plates ; will be-. stirring or carrying, the, was. or pulp, it follows tha ercome> cdnical at tbeir grinding surfaces. ‘Reason tells , _ there i is a. saving of seven and a half per,cent. of power, eM te oe ode Tel lhe us still: fartber, that the portions of Rid grinding plates , : “in favor’ of the tractory: formed: ‘pan over, the. planejor -moo . fi The.mormris up agein—the/dewy-morn, 3 to 7 dual o¥c ‘hear their centérs come, to a elose ground, jotnt,’,.and _ flat bottomed pane: Litho feo csuey . ait ar toni -yatome f With breath jall incense, and with cheek all: ‘bloom, ll tbat ‘the Pon hee iid love amily otra ceawae=aals Therefore): ‘on this, the éecond of Mer ‘Goodyear’s’ Laughing the ¢londs away with playful scorn, eri <_. “ “mdin’ ‘aud important points,” it! ‘Seems’ to me'that he ae peepee “a we And, living ag if earth contained, no, tomb, we ‘coming’ ‘smooth; and the’ material being thus prevented’ . ! firas' Wimself: ‘about’ in the: position’ or . predican ent ofa! ee, Goodyear « cavhigbly ieater Sie * from, éoming between, them at these* points, tbat’ ‘the ". certain character. in, the. “ Georgia , Scenes 7 fe wh a Guin a) t! lates wear awa, slow] and bence’ accomplish cof are could look but one, way, and that upward.” i ap _saccomplished:mathematician,I:can byt congratulate my-. _ De y Js LB 14 ial ptebable*begins, tevscauthdaheweat of all ra -*self to find: him indorsing, ‘almost'to” “the fullest, extent, 9 "atively. ui little grinding, effect, Aen naan tbings'” » fears.wassthat of “ lugging” v= Nh ” as ai subjectumligy my’ ‘deductions’ “relative! to the *“ properties’ ‘of grinding . whieh, reason tells us, practice con mms 0 tne tu est. ex -:. nathe discussion. ore NN © plates” Byer tbe! Scfswniric! Pause, “fake 950. 'be’ ob! tent. On this‘point : une authority of practical mechanics . opAgain, from a practical stand . point;"it, hag neal ei Jorg ae ibeerre . . is conclusive. ‘Now. in practice, as well as in theory, it shown that , the differénce in the’ grinding « effects’ of the serves 4 By 1 oa Ba 9 the above Te ge ee 2 te i plane and tractory formed « ‘pans 1s jgreater ‘than see ile, Gaetinie « i Randall V's_recapitul lation, PRs page, 269, t will bé séen’”. 2 ae =? i, formed acters Wotplaggs ons Ap termined by theory, hence the true per centage in prac_ that, we, ;nOWw agree . with, reference. ‘rst, to tbe mutual attains a by the, oe ks 2 icmcurve “4 face,” Phe hitherto : . . tice in favor of the tractory pan is greater than above, j a] rafts p ratios, for. entire Plates of equaleweights among them— quoted. These, things being so, how stands the, first. re shown. lee q qt s'selves; ‘and. second to the mutualiratios tor*ring plates Mr. Goodyear’s “main .and important points,” to-wit: Bat farther, let us look at the truthfulness and Pace P : ee. me om cability of tbis proposition:of Mr. Goodyear, viz: “lof equal weight among theinselves; but that we; still . “uniformity of vertical wear independent of the partic« Neither these ”’ (referring to the tractory, ‘aldoseontenn ” ? _vidisagvee a3"to the ratio betWeén entire. plates and ring“ ular form of. eer ? It is aes tbat Mr. Goad pan. of, certain ps roportions,) & ‘nor any other forms" pros ~ plates ‘of the sdme ce ee . ei ge rele’ is utterly. ae eee eX. m. 4 al fe “ves 1 “dice an increased gtinding effect ‘except at the expense i fis ogc cero Mm ers tang 4 Now’we' may well infer that in practice, the ISPTOr ite OP ig precisely proportional ‘amou of power, and we av Now on this, point, hy, reference to my first Feply"t to ‘portion in the distribution of pressure is much greater, eawObttt thigssame Regul qvith an i form, b pect tg ME Goodyear; it will ,be, found that I did not jpeg than in theory. ‘Now, if Mr, Goodyear, yvill carefully the weight or size of. the plates.. uf ‘iff ‘é 1) Rs: tbe:weight of.tbe ring ,plate in any of the’ cases’ 7 hie ayn sr pbicng. une. ther ioe In the-first. place, this proposition is nob strictly itrue 5 ~-wecapitulated, equal to thatsof.!the entire plate. . It’ is E:G. he will readily pertelve ane Tdo iat De ii: bra \« for if the weight is 'increaséd, the: size of the muller‘is

thus so expressed, both by word and formula, . : ¥, howequal distribution of pressure in plane and conical plates " heaton? $ be. . sae i trate ,-ever, Mr. Goodyear has succeeded,in, making this' point, 1 of uniform ,bardness. ‘bat proportion “was derived pa & ry" i in tbe muller. involves an increase in the hii t of the jvelearer td the public mind, I shall: be found “tbe, last in from ae entirely different state of facts, as clearly’ ga rim of the pan. we scant ny! EE cot oattémpting to pluck adaurel. from! his: brow.’ “Again, Mr. ’ 2 ears: aS a discussion of Plate-A, page els ye a age its ‘structure.. Hence,:we: see that the.entire, weight of; 2 sayy a u Goodyear, after complaining that the metit of 5 errors . Let us now rhe my. proposition “ tbat the tractory! the ma¢ hine would :be greatly increased, tbe first cost oAvere! ‘not better ‘appreciated, and ‘after ” recoun 1. with eon ede naceillede ververiichhorcaroremehancithen would’ ‘also be increased, the freivht cost would 1 be ‘inMo vitleritcatistasti hi ib: thy t ‘. the flat ie conical pan of tb ee , oil ido the “creased, the cost of . ‘* setting up »” would be increased, — et ae ent t sat , ac ion, ov e su sequent y, corree e those ale 3 Pe les va s ¢) . and the ‘stibsequent cost atid inconveniences of Working _ CEEOTS « ‘and made his. whew “deductions to, conform . per7 samme i amount of Work“at a less expense 0 power.’ + yout He"inersased i coal ile “To the first pat ‘of this proposition, namely ci tectly: to those already. obtained, iby) the jauthor: of the “the tractory formed, pai Will do very much more work, “ Supplement to the Wheeler & Randall's Quartz’ Opthan either, the flat or conical pan’ of the'same weight,” _ grators) Hand . Book,” becomes highly. self:congr atula-y,. and of the proportions hitherto discussed, Mr. Goodyear, ; _tory,,and observes :., It will now be evidenity I'think, . fully accedes. .On page 291,’he says: “The tractory py both, from what ;T :haye. said, and , from, Mi, ‘Randall’s , ‘ “conoid: does produce a greater effect i ve a ingle PRE anda ithousaiid ; and dne other gimer dicks, would dishonor, dmissions; that the Hi a: Book: adi Pacasle) Uy MT iti: Mei Cone taares Nor, as ‘td the . at icht, thi invention, of Mr. Good: éar. a own. admissions; thatstbe:Hand Book contained in. printmeasure of this effect, ag theoretically’ determined by us ‘(}:7" 4 a sere « This will never do. Quartz miners and operators, who, with: Job-like., patience, have, endured »“.Rotary ‘Batteries,’ étellRoarers,”. “ Coneussion . Cencentra’ . tors,” . Dry. #, Awalgdmators” , 2 Seeret i*Processes,? “double and “Twila compound hyfaluting, compelexities, si eiple;as well as.ni.detail, suffidient errors and ‘fallacies’ both, do we disagree. Each .finds tbe relative cee : The € lements ‘of lightness, soubienlen a a and {to justly subject’ it to aiel ate as! ‘severe as ‘any tbat a _ effects of the sev eral (pans to be for—'. 01) te. uid bie eae 1 panakizeprarstors a9 rot bie they ee. have made.” si onl ae ‘Plane or flat hottomed....0.4 1.1852, * . “greater Perfection in the tractory’pan’tban in a any other © "Phig-is decidedly 'peffeghing, “af not altogether. anodest, . ; ae ad ee an 5 acrid . ree “offeréd to the 'public. © +l e= “ae ei and’ ‘brings to ‘tmirid ‘the’ fides! of ‘anotber. hero; equally i Te la ta fi im sercbcictin ns a L ra eh re eee ae inn direct Esp entitled ee at ‘special meri iets immed a . ratieved ‘ih ‘o the last part Q my proposition, namely, “and do': » between: ‘the tractory’ and conical pans, ‘arther than to Ou a a ne . ) the same amount of work: at a less expense of power,” ‘tp say that the: ratio, theoretically, ‘determined, does not self 0, his’ burden; ‘There is “Perey, . if ‘your Gathers he emphatically: objects. Now the manner of working i hold good ‘in ‘practice. io “That i in fact, the efficiency of the ol “do me any, /honor, 50.5, if net] Jet him kill the: mext™ these different formed pans,-is to put a: large amourit’ ‘of eonital is not,above that of the flat’ botiomed pan. :! The. F ., Perey himself” CE cis 8 mmr CE we tigen, Erato 1,500 or 2,000 pounds into ‘them; adding ‘suffi-’’. ' reason of this apparent discrepancy between theory and ‘L qi ty al had oe water'to it to “reduce it to a pasty consistency. —Ppractice, to no: little extent, arises from the “unsteady and -juzULet us: now turn-our attention to a’ more! ‘practical ‘Now if the muller be’ ‘raised, fr: om the, stationary plate, swinging motion of the conical muller having its’ réater, consideration of the properties of’ gritiding plates. $0 as not to gfind at ‘all, itis ‘evident that it requires an . base “upward. ‘That. is, the! muller wearing gene at its yd ‘Aor near, the.close of: my first reply to,,Mr. Good. . expenditure rae no little power to stir this mass and to! greater circumference and, ‘then, coming: to bear “almost years page 2 60, I remarked: “ What was claimed and. carry i around. Each revolution’ costs'some er entirely on its, lower, and smaller hase, seems to “ toss nidvelshedtan@ aires, iE the eedtely 4 a. ‘The cost’ of this power depends much upon ‘the ¢conabout and’ labor. like a. ship in & heavy sea,” without: d y tormed pan '}sistency ‘of thé’ mass treated, and the velocity of the . scarcé making a single knottoward the destined havens oowill do very’ ‘much more work tban ‘either the flat or . ° muller. On an’ average, it is probably not less than fif. / 448 consideration ‘of the foregoing ‘facts, it does ¢eemy ‘\eonicel 4 pan « of the sanie weight’; and’ I will now Nada, do ". teen ‘per cent. of the whole power, expended when’ the r. Goodyear to the contrary ndtwithstanding; that the ‘ “the; same a arhount of’ “work at a “Tess ‘ expense of’ poiver.” * . ee is let: down to a full’ weight or "grinding caAe pe ie Lean ‘peculiar advantages ¢ over the, “the > ete ‘flat bottomed and conical, in very many, res, ects. , seta en Mr. Sune ear. “denies the,’ ai or This frie ha is eal upon the opinions of ee, “ In conclusion, allow me’ to. an vas Pe of arco anc S2yis)On page, 291, fall Inechanics and. quartz operators. ‘But whbetber the . another,'and,say; ‘“ Among the feelings which at tbis p vat ‘or near the close of “his discussion ; “The errors, expenditure, comparatively, be ‘more or less than fifteen }"' moment fill my breast, not» the least isithat of regret at «into, which “it fell “myself, though, tbey affected: my, nu-,.;. .Pe, cent. of the entire power, matters not’ in this’ digcus© . the’ position ° in which” Mr. ‘ “Goodyear “has placed *‘merical ‘results, did not affect the, ynain and important ke ais autitent, for a ptespt purpose st yak shimeelts Ee does sad fds ie aye focal “The ate , Hat no 1 iderable amount o ower is expended for, . whi e@; has es ousei nds no basis in “mechanics points: upon which I insisted, and, upon which Mr, Ran-, . ; stirring .and carrying around the sk cal Rui. : ae fs trand:: practice, ah a succor, from, public sympathy, no dall, is! wrong, which: sages el A uniformity. « of, vertical Now tbe “unavoidable, conclusion is, tbat. the: pa vor: . . cheering” from a mining “community. He has.-no, nuiler, acts in two capacities: first, that of a grinder: . ' foothold on which to stand while he might display the and second, grinding effect. considered i in’ connection mith “ second, tbat i a stirrer or carrier.” Taking the relative . ‘powers of his acknowledged talents. Every thing be+ “power the only just standard’ of compari rinding effec s of the plane, or flat bottomed _pan, at . néatb his feet is hollow and treacherous. He is like'a jie a yh a parison.:; And my: moyagae and 'the grinding effects of the tractory formed . . ‘strongman struggling in a morass’: evéry. effort to ex«fist assertion that in this light the tractory conoid’ pos--pant at ‘1. 7778, (which"numbers are nearly in the ratio . tricate himself only sinks bim deeper and deeper. “gesses no peculiar advantages: remains undeniably triie.”*) ‘of two to thr ee)y as detérmined both by Mr. Goodycar “And I fear the resemblance may be carried still farther; From’ a theoretical stand point, both. Mr. Goodyear ’ ‘and! myself, let us see it’ my proposition ‘is not rigidly * T fear that no friend can safely come to his relief, that and myself hayediet eed, the properties of grinding and: practically true ‘that the tractory formed’ pan will . ‘'no one ¢an approach near euough to hold out a helping Mates as if they came in direct contact in all their a “do the same amount.of work as the plane or conical hand, without danger of, going down himself, also, into ‘in arta j or at mos that onl: la Bring! pan at a less <= Rense. of power,” Let there bé no mis_ wae bottomless depths ; of this Perbonion, bog. 4 8 P a t 1 a : at only, a. a layer of. niaterial’ tnji.),,, understanding, in reference to the, use, of the term 7 SAN: ‘FRANo1900, May 16, 1866.00.00) u: yes G3