The Bridgeport evening farmer., 1909-05-24
NEWEST NOTES OF SCIENCE

production of salt last year at 4,035, ,0S9 tons, a decrease from 1907 of 1884 tons.
 Scientific efforts to combat the South African sleeping sickness already have cost the lives of seven European physicians.
 According to a professor of the French Academy of Science all the ele- ments of food needed by man are con- tained in Gruyere cheese.
 Corn cobs, compressed into blocks, bound with wire and soaked in tar. are used to build houses in some parts of Germany and Russia.
 Fossil remains of a mammoth, in- cluding a tusk of prodigious size, have been unearthed in a railroad cutting near Malines, Belgium.
 Nearly twice as many persons travel vertically by elevator every day in New York as horizontally by elevated. surface or subway cars.
 The latest estimate of the population of the world placed the figures at 1,- 467, ,000, 900, an average of about 31 in habitants per square mile.
 The residue rejected by Greeks who smelted lead where it was mined as far back as 800 B. C., is being worked over today by modern methods.
 In an actual test a new style steel coke car adopted by the Pennsylvania railroad dumped it's load of 100000 pounds in minute and 45 seconds
 As a, part of a national movement for better preservation of the teeth, sev- eraI German cities are providing free dental treatment for school children.
 Oak gals, heretofore thought to De of purely vegetable growth, have been determined to be due to insect attacks by coterie of British scientists.
 Delegates from 8 countries attend ed the recent international congress Of refrigerating industries at Paris and formed a permanent association.
 The importation of Ceylon elephants to work in the Philippine lumber camps is proposed to make up for the scarcity of draft animals in the is lands.
 To create a. greater demand for it's current during the daytime, a Chicago electric company recently loaned 10000 CTS.
 A pineapple cannery in Formosa, managed by Japanese, also extracts the long fibre from the leaf of the fruit for use in the manufacture of grass cloth.
 Natural gas from certain wells in Kansas is found to contain two per cent. of helium and scientific experts are working on the problem of ex- tracting it.
 House cleaning is made easier by a new vacuum cleaner, in which bellows, operated by two long handles, suck the dust from carpets or walls through a nozzle.
 The 6s2-pound Guffey meteorite, found near the Colorado town of that name in 1907, has been acquired by tory at New York.
 That many cases of color blindness may be cured, or at least rendered less serious, by practicing pima tions, is asserted by an Eastern oculist of note.
 Resembling ice tongs in appearance. but without sharp ends, are the new tools, invented by Connecticut man hon 1inC h0Sa hv fremen.
 The deepest bore ever made into the earth'S surface for industrial purposes is said to be the Buyer oil well at Ronchamp France. wr1ch reaches a depth of 3,310 feet.
 Several of the smaller Michigan cit ies are experimenting with street ngnt- ing by hanging arches of tungsten lamps across the highways from the caves of buildings.
 "Burglar-proof" plate glass, made by a firm at Rheims, France, is said to have withstood blows from a. steel Shod ma1let and revolver shots, Tn tests, without breaking.
 The Chilean Congress has abrogated a contract made by President Montt with a French company for harbor inn provementS at Valparaiso, which were to have cost $19, 466, 900.
 The production of all kinds Of ce- ment in the United States last year totalled 52.775.s25 barrels. worth $44,- 0iO,oSO, d Q6CTedSe III value IAOiiI ASos of over s11, 800, 900.
 Experiments have shown that Hertz ian waves will pass through stone walls more than three feet thick. but will be stopped by tin sheets no thick CT than cigarette paper.
 Pennsylvania led in the production of slate last year, followed by Yer mont, Maine, Virginia. New York. New Jersey, Maryland. California and Ar kansas, in the order named.
 To economize time in curing hams, a Minnesota man has patented a per forated tube with a sharp point, which can be inserted into meat for the 1n- troductfon of the pickling solution.
 A few years ago 60,000 volts was con- sidered a maximum tension for cleo trical transmission lines. Now an 80,- signed for 100, 900 volts is planned.
 The army is testing three-inch shell which has the properties of both solid shot and. shrapnel. Behind steel head is a. casing containing 12O bullets and a charge of high explo- sive.
 Promoters of an experimental plant at Vancouver for the electrical dist1l- lation of turpentine from resinous woods claim the resulting by-productS more than pay the cost of operation.
 Electrical incubation, with which ex- perimentS are under way in Europe, is said to produce higher percentage of chickens, which also are materially stronger and healthier, than the older methods.
 Opalescent glass. for use in stained glass windows. as manufactured in the United States. never has been du- plicated in any other country and the expectations of 1t to Europe are stead fly increa sing.
 The Government of Argentina is planning to spend about $27 ,000, 900 in enlarging the port of Buenos Ayres and $10, 0OO, 900 more on a canal to con- meet the port with the River de las PalmaS.
 The Japanese Minister of Communi- cations is Investigating the advisab bility of transporting mail by automobiles in the larger cities of that country and to remote regions not yet reached by railroad.
 Ten grains of prussic acid per quart have been extracted from water taken