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Volume 35 (1877) (426 pages)

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374 MINING AND SCIENTIFIC PRESS. [December 15, 1877.
Trees and Rainfall.
No 4.
(Written for the Press by Samurn PURNELL. .
Conditions in California.
The same monsoon that hlows across the hot
sands of Arizona, sweeps also over the Colorado
and Mohave deserts, hut for the same reasons
that it could deposit no rain in Arizona it can
deposit none in southern California. Moisture
caunot he condeused from a wind that is cooler
than the earth. The only summer rains that
fall upon western Arizona or southern California
are those locally denominated ‘‘cloud hursts,”
in which the rain, instead of falling gently,
comes from the cloud as one sheet of water, and
gives rise to mountain torrents that carry everything before them and add additional desolation to the country. ‘Cloud bursts” have their
origin in electrical discharges, as the electrical
discharge takes place instantly, so does the
water fall from the clouds where it bad heen
held in repulsion while somewhat cooled by the
resence of high mountains. Accordingly we
ind “‘cloud bursts” are discharged upon mountaius that overlook hot and sandy valleys. The
reflected heat of the latter drives the clouds to
the extreme point of the mountain, and, amid
great, electrical disturhance, sheets of water descend so suddenly and with such force that
portions of the clouds are carried along. This
water is from the South Atlantic, and the winds
that brought it, heiug now almost completely
deprived of moisture, are deflected by the Mohave mountains, and are not felt upon the coast
or in the valleys of California and Oregon. The
Pacific coast, receiving no suminer rains from
the great Atlautic current that waters all the
couutry to the east, has only the winds of the
Pacific ocean from which to hope for summer
rains, That no summer rains fall in California,
hut that they fall in abundance in Oregon and
farther north, is well known; it is-not so well
known why.
The Wind
That blows upou the Pacific coast from May to
October is called a ‘‘trade wind.” A northern
equatorial current of water strikes the coast of
Asia near the Island of Formosa, is deflected
north and northeast, forming the Japan current,
or the Black stream. This gives off the Kamtchatka current running up toward Behring’s
strait; but the inain body crosses over toward
Alaska, then runs south as the Pacifie coast
eurrent, and off the coast of Mexico, into the
equatorial circulation.
Accompanying this vast body of moving
water is a strong wind, the north Pacihe trade
wind, which in Oregon hlows from the north
and in California from the north west. Blowing over a sea cooled hy au Arctic current,
saturated with moisture at as lowa temperature
as 53° F., its relative humidity is very low,
containing but about four grains ot water to
the ‘euhie foot of air, or only ahout one-third
that possessed hy the warm monsoon when it
strikes the valley of the lower Mississippi. At
this low temperature it strikes the coast of California, which is generally bare of trees, in
many places sandy and heated wp from 70° to
90°, The consequence is that as soon as the
moist, cool wind strikes the heated land its
temperature is elevated, its relative humidity
is lowered, it relatively contains but half as
much moisture, it can now ahsorh more water,
and instead of being in a conditon to impart
moisture it will dry everything that it passes
over, The summer trade wind can only he
caused to deposit a portion of its moisture upon
California by cooling it helow its dew point,
when it would probably deposit half its vapor
hefore it reached the Sierras,
There is but one way to accomplish this, and
that is hy the planting and maintenance of
forests upon the coast range of mountains, and
covering all the valleys not absolutely needed for
the sustenance of the people, with living grass
and trees. As long as the present nakedness
of the valleys and mountains of the coast coutiunes there can be no hope for summer rains,
and the interior of the State must, for the
greater part of the year remain a harren and
hurniug region.
In Oregon
Summer rains frequently and regularly fall and
are precipitated from the same trade wind that
strikes the California coast, but Oregon offers
conditions wherehy the wind is cooled and its
water falls. Western Oregon is densely wooded
and to that fact is due the annual fall of 60
inches of rain or three times as much as the
average of California, Western Oregon, in cousequence of this rainfall, equally distributed
throughout the year, has a far superior climate
to, and is far more productive than any portion
of California, and her great Willamette valley
ig a paradise when compared with hot and arid
wastes of the interior of this State.
Jn Eastern Oregon the lofty Cascade mountains squeeze from the trade winds the balance
of its precipitable moisture, and east of them
Oregon has few or no forests, only a few inches
of rain anuually, and is in the generally harren
condition of Nevada. North of Oregon the
forests are still denser, the earth is still cooler
and still more rain is thrown down. The rainfall, as to amount aud time, upon the western
coast of Mexico is substantially like that of
sonthern California,
a Sun Spots and Rain.
As all terrestial motion depends upon aud is
transmitted from the sun, it follows that more
or less activity of the sun will cause more or
less activity in the motive powers at work upon
the earth. After many years of ohservation in
many parts of the globe, it has heen determined
that the activity and dynamic quality of the
sun Varies from year to year and in a cycle of
about 11 years, and that this varied activity is
coincident with an increase and diminution of
sun spots. When the surface of the sun is
thickly covered with spots, its potency is enormously magnified, and the solar forces which
govern all terrestial phenomena are correspond-"
ingly exalted. At such times great storms and
cyclones sweep over the earth, free electricity
is ahundant, and the quantity of water evaporated from tropical seas by the electro-dynamic
action of the snn is so large that the whole earth
is well watered by copious rains. On the other
hand, during the period of minimum sun spots,
the dynamism of the solar envelope is greatly
lessened and its influence npon the earth is correspondingly decreased. At sucb periods, the
atmosphere is generally calm, ships sail through
tranquil seas, hot weather prevails, and there is
too little electricity in circulation to mechauically produce the great tropical evaporation
necessary to water the earth; drowths then .
prevail.
This has been found to be invariahly the case
in India—a country most admirably fitted for
meteorological exploratiou—where it has heen
definitely ascertained that years of drowth and
famine correspond with those of minimum sun
spots, and vive versa. Consequently, it has been
possible to predict, approximately, the annual
rainfall of India and its resulting plenteousness
or famine. The same has been found to be true
of the Cape of Good Hope, and of other places
where systematic ohservations haye heen made,
and it will be found true of all parts of the
earth when science has encompassed it,
The whole scope of the power and influence
of sun spots, or of that solar condition of which
they are indicative—the learning of which, in
fact, constitutes the new meteorology, and emhraces all of the science that has any prophetic
value or stahle foundation—is not yet eutirely
understood, as the determination of their effect
is quite recent, and profound investigations are
still in progress ; but enough is already known
to affirm in the strongest manner that the number and volume of sun spots is an indication
and prophecy of mild or intense solar disturhance and poteucy, to every variation of which
the earth immediately responds, and as the volwme of the sun spots increases toward the middle of the cycle so do the terrestrial forces increase and ultimate iu tempests, electric storms,
and especially in that great equatorial evaporation that hrings copions rains upou the earth at
large.
While the total amount of moisture falling
upon the earth during a season is gauged quite
accurately hy the sun spots, yet the rainfall of
any particular country during any particular
year is modified hy continental and cosmical influences at present but imperfectly understood,
as sometimes under a minimum of sun spots a
country receives more rainfall than upon the
average, and vice versa, the rain not being distributed strictly as the aspect of the sun would
appear to indicate; still the rule is surely ascertained, and the general quantity of rainfall
can be now confidently predicted far in advance
of its coming, and to a certaiu extent the probable local rainfall of any particular country.
By reference to a chart it will be seen that
the dearth of the winter rainfall of California
since 1849 appears to have been dominated by
the 1l-year periods, and hy the solar potency
immediately preceding and succeeding the cycle
years, Although locally it has received heavy
rainfalls in certain years that do not appear to!
correspond with the solar disturbance, the reasons for which ean at present be only surmised,
yet it appears certain that the amount of rainfall has generally heen relative to the number
and magnitude of the sun spots. The year
1876 was the close of a cycle, and was one of a
minimnm of sun spots. Dronths occurred in
India, Southern Africa, Australia, the Pacilic
coast of America, and especially in California. Thesolar aspect during the present fall,
that of 1877, is much like that of 1876, the sun
now heiug hut slightly more spotted than then,
and averaging hut ahout one-tenth the maximum
sun spot area. While influences and modifiers,
of which we are at present in almost complete
ignorance, may materially vary up or down the
totality of the rainfall upon this coast during
this winter, yet in consideration of the paucity
of sun spots and the absence of electro-dynamism the author, in accordance with the latest
deductions of science, ventures to predict that
the rainfall this winter will not vary much in
quantity from that of the winter of 1876, when
the rainfall at San Francisco was less than 10
inches, and that, consequently, another dry
season pon the Pacilic coast may be confidently
anticipated.
The Winter Rains
Of the Pacific coast need but little attention in
this connection. They usually fall in ample
volume, and equal in amount those of most
fertile countries, The rain winds of winter
come from the southwest; a warm ocean wind,
saturated with moisture at a high temperature,
and carrying three times more water than the
summer winds. Being winter in the northern
hemisphere the land is much cooler than in
summer, much cvoler thau the southwest wind,
and as that wind sweeps over the mountains it
is cooled helow its dew point and part of its
moisture falls as rain. This is the case annually, and all parts of the State receive the
haptism of water, whether naked or wooded,
The amount of forest, however, has a great influence upon the amount of local rainfall; the
Colorado desert and western Arizona receiving
hut about three inches; the vicinity of San
Diego, 10 inches; San Francisco, 21 inches;
Humboldt hay, 34 inches; while the forested
Sierras receive the copious drenching of from
fonr to six feet of water,
It is not the want of winter rains, but the
absolute dearth of summer rains that renders so
large a part of the Pacific coast barren and inhospitahle, and which, if not remedied by the
wisdom and labor of man, will for ‘many centuries in advance maintain a hot and arid waste
over a portion of the earth that is capahle of
heing converted hy summer showers into a paradisean region of plenty and delight.
The hnman
History of California
Reaches back hit three centuries, and its testiA HANDY FAMILY TOOL CHEST,
mony upon the forestsis meager. From the
narrative hy Cahrillo of his voyage along the
lower coast, it is ascertained that the coast and
the islands of the coast of Santa Barhara were
then densely peopled with native Indians,
covered with trees and verdure, and ahounding
in perennial streams; that summer rains refreshed the earth, and that all the country
visited for hundreds of miles was a sceue of
almost tropical life and luxuriance. How different now! Since the fatal presence of the
white man, with his false ideas of prosperity,
his delusive notions of the necessities of civilization, and his supreme selfishness, the forests
have been felled, the streams have disappeared,
the springs are dry, the summer rains no longer
fall to refresh the land, the native people have
heeome entirely extinct, and most of the
country is uncultivatable, a parched and
wretched region where the few dwellers maintain a hopeless struggle with nature in lahoring
for a precarious existence by cultivating such
fruits and grains as can he produced by the
scauty winter rains and from an insignificant
amount of irrigation. To such a state has the
felling of the forests reduced the coast of southeru California. Not only has the coast heen
ruined, hut also the country away hack among
the mountains and valleys of the interior. For
instance, at Tejon pass, and other places where
50 years ago were never failing streams and
water for itrigation, and which were noted for
grazing, a change has taken place. The bunch
grass which once covered the hills, no louger
grows there at all, and even the half-starved
sheep can scarcely find water enough to drink.
The Santa Clara river of Ventura couuty and
Posa creek, and the springs which feed thei,
have mostly dried up and generally the streams
and lakes of the Sierra Nevada and the Sierra
Madre, which, not so very long ago, were overflowing with water, are now either totally dry
or are rapidly becoming so. The time was
when Owen’s lake, Mono lake, Soda lake, the
dead lakes of Panamint and Death valleys, and
the large lake of the Coahula valley, were fed
fnll hy the ample rains. They have only hecome
stagnant and dry within the past few hundred
years.
The fact should not he concealed that southern and central California are Heogming dryer,
that less rain is falling, and that the desert is
approaching still nearer to the sea, for when it
is completely realized, means will be fonnd to
remedy the evil. Small groves of trees are disappearing, the water in the wells nust he sought
deeper, the artesian wells flow less, the winters
have less rain, but little snow falls upon the
mountains or long remains, great river heds are
seen through which small brooks do not now
run, and the climate in summer upon the deserts
possesses an average temperature of 100° to
114°, equal to that of the great Sahara, and
much hotter than that of India, Persia and the
Red Sea. The evaporation of southern and
central California in summer equals one-quarter
of an inch in 24hours, The annual evaporation
would amount to 95 inches, or equal to that of
the Dead Sea. Were the entire flow of the
Colorado river turned into the desert, it would
all he evaporated from a lake of 556 square miles
of surface. At a few hundred feef from au
interior river, its influence iu raising the
average humidity is not perceptible, so quickly
is the vapor diffused into the surrounding air.
Amateur Carpentry.
There are very few men, either young or old,
who cannot do a very useful and very satisfactory little joh of home carpentry if they have a
few tools fitted for it. There are a hundred little things a month which may be either made
or repaired, and thus made to minister to convenience and comfort. They are often too small
to call in the practical mechanic, and unless the
amateur can encompass the need there is often
a loss of both money and enjoyment, More
than this there isan ever present advantage to the
young man who early learns the use of a few
simple tools, and there is a never ending gratification in the well-doing of a joh to one who has
once tasted the satisfaction of the mechanic’s
achievements. The economy of home carpentery; the instruction of the young in the use of
tools, and the gratification of all who have
tastes for mechanism, are all made more attainable hy the very compact and yet comprehensive sets of small tools which are contrived by
our tool makers. We bad one of these sets of
an early pattern 20 years ago, and, though since
that time, we have goue through an apprenticeship at the hench and the lathe, we still find a
set of the modern improved amateur tools of
constant service to usin our little home mechanics.
These remarks, drawn from our own experience, are called out by the engraving on this
page representing a little ‘‘ Family Tool Chest,”
which we have used to good advantage. It is
one of many styles of low-priced tool chests
sold by Dunham, Carrigan & Co., of Front
street, 8S. F. One of them would bea far better
Christmas present for a hoy or young man than all
the useless things which are brought forward at
holiday time. Nor are they exclusively for
young men, We have a good lady at our house
who can use the contents of the little chest as
handily as she does her sewing machine when a
little woodwork in the house or in the garden,
needs immediate attention. We have no doubt
that many of our readers will find styles of
these useful chests to please them in the interesting circular issued by the firm we have named
above.
Minine Surr.—The Keystone mining company has entered suit in the First Judicial District Court of Nevada, praying that the tax
title under which the Lady Washington mining
company lays claim to the Keystone ground, he
declared invahd. The complaint sets forth that
tbe plaintiff is incorporated under the laws of
the State of California; thatthe defendant is
also incorporated uuder the same laws; that
since March 2d, 1874, plu has heen the
owner of and in peaceable possession of the
mining ground (which is 1,200 feet in length),
known as the Keystone company’s claim ; that
suhsequent to the acquisition of said ground by
said plaintiff, the defendants claim to have acquired a right and title to the premises of plaintiff hy purchase at a tax sale hy the Town Marshal of Gold Hill; and that defendants claim
solely under a deed executed hy sgid Town Masshal of Gold Hill. Wherefore plaintiff prays
that judgment he entered in favor of plaintiff,
declaring and estahlishing its title and estate to
the premises above descrihed to he valid and
ahsolute, and that the title claimed hy the defendants be declared invalid.
Ory Rams ks Brice Marsrtat.—We
read in the Railroad Gazette that a new use for
old rails is suggested hy two Austrian engineers, who have puhlished a book containing
designs of hridges and other framework constructed almost wholly from old rails, the counections heing sometimes made hy means of
other rolled irou shapes and sometimes hy bolts
and rivits. At present prices, it is said that
the structures of old rails are 27 to 30 per cent.
cheaper than equivalent structures of ordinary
forms. Holes in rails used for such purposes
must he drilled and not punched, and this increases the expense somewhat, hut it is claimed
that the rails are worth much more for such
purposes than for re-rolling, and that they are
very good shapes for use in structures, wheu
properly used. It does not appear from what
we see said of the book whether the authors
have actually made any bridges of old rails.
Tue attempt to introduce dummy engines of
the kind used in Philadelphia upon the Cincinnati street railroads has been abandoned,