The Arkansaw traveler., 1889-08-24
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 SCIENTIFIC MISCELLANY.

The annual production Of chsmicsls ia France Ia sid to have reached the great value of $500 0o0
 An Austrian botanist Prof Peyritsch, has dis- covered that double howen may be srtinciAlly produced by mites, and believes that each flower has its peculiar mite-parAsits which gives ri.s to the doubling.
 According to Mr. e. H. verrall, F.E. g., there are about one hundred species Of mosquito in existence, of which eight or ten inhabit England No specially tropical species is known in Britain, but . we'll known British species was recently found in Mexico.
 wheel Is claimed by valley near Grenob'e France, where turbine ten feet in diameter has been operated since 1875 with . head of i,63s feet flow of about seventy five gallons of water per second gives force of 1 500 horse power.
 From 5O,0O0 analyses In German laboratory 1t appears that fluctuations In the solids of milk depend almost entirely On variations Of the fat The evening milk is richer than that of the morn- ing, and the November and December milk than that of other months.
 PREVENTIVE INocuLATIoN.-French farmers, at least have appreciated the importance of Pasteurs discoveries that the virus In many infectious diseases is due to microbes, and that the microbes especially in fowl cholera spenic fever in cattle and sheep, and red fever in swine-may be % weakened by artificial culture that inoculation with them gives only mild disorders while securing immunity from fatal forms of the diseases. M Roux, of the Pasteur Laboratory. In Paris states that the agricultural societies of France Italy, and Austria have adopted the inoculAtion treatment, and the various insurance companies require 1t. The sheep treated annually in France number 25O,OOO or more. Inoculations In man for hydro phobia have been made after the disease germs had already entered the system from the bites of mad dogs, yet it Is claimed that the mortality is now only one per cent. among persons treated and fifteen per cent. among those not treated.
 ALUMINIUM IN ENGLAND-Sir Henry Roscoe mentions that third of a century ago aluminium was made in minute quantities, and sold at three pounds per ounce, while the metal is now manu- factured by the ton at Oldbury, near Birmingham, and sold at twenty shillings per pound. Pre- vious to 1887 the worlds annual production pro- bAbly did not exceed 10000 lbs, but the works of the Oldbury compauy-covering nearly i've acres-now have 6 producing capacity alone of 100000 lbs- The Eastern Deville process Is em- ployed. By this method, the production of one ton of aluminium requires the use of $500 pounds ofmetallic sodium 22 100 pounds fdouble chloride, 5000 pounds of oite and eight tons of coal The 300 pounds of sodium is prepared with A 1000 pounds of caustic soda, 1000 pounds of carbide (made from pitch and iron flings), two and one half tons of crucible castings and seventy of coal. For the making of the 24,Oo0 pounds of double chloride gro needed 5000 pounds of common salt II 000pounds of alumina hydrate 900 pounds of chlorine gas, and one hundred and eighty tons of coal and the 15,OO0 pounds of chlorine gas re quire lS0,0O0 pounds of hydrochloric a9id, 45,00O pounds of limestone dust, 30,0O0 pounds of lime, and loss of one thousand pounds of manganese.