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Science And Industry

Science And Industry image
Parent Issue
Day
31
Month
August
Year
1887
Copyright
Public Domain
OCR Text

- There are 8,000 men employed in drift-mining in California, and the prod - uct is $5,000,000 a year. - A machine has been invented that prints the skles and ends of boxes at the same time at the rate of 2,500 per hour. - A Chub lock axhibited showed that a variation of only the two-hundredth part of an inch in one of the steps of the key was suffieient to render the key useless. - Boston Budget. - The oxide of iron is one of the moft adhesive cementa for ron. With thi a joint can be made so peffect that tho iron will break before the cement will part. It is mixed with sulphur and sal-ammoniac moistened with water. - In certain Austrian coal minen work is suspended in dangerous placel during a fall of the barometer, experiments still in progresa having shown that the quantity and intensity of explosive gases greatly increase as the degree of atmospheric pressure diniinishes. - By an iraproved process, in which a compound prepared by coking iron and pitch together is used as the reducing agent, an English chemist claims to be able to lower the cost of metallic sodium to about thirty cents a pound when produced on a large scale. - A scientifie novelty is a lens which magnifies, yet is perfectly flat on both sides. It is made at Jena by the manufacturers of Prof. Abbe's new optical glass. The lens consists of a single disc whose density varíes so that its refractive power decreases regulafly from the surface inward. - Among the reported discoveries for the prevention of rabies is that of Dr. Fernandez, of Barcelona, who claims that a dog that has been bitten by a viper never has rabies, and can not become rabid when inoculated. He has inoculated dogs with viper's poison, and he holds that under no circuíastances will thcy ever betome rabid. -New Orleans is sharing largely in the manufacturing boom which is now spreading over the South. In one number of a Southern paper a boot and shoc factory, a wire-works factory, a factory for the extraction of turpentinè from pine-knots, thrce tobáceo faetones, and a glycerino and stearine factory are mentioned as having been either started or projectcd in New Orleans, besides a company for a lina of stcamers to run to Columbus, Ga. ', - A writer in a Canadian paper, gpeaking of the possibilitics of pulp as a substituto for lumber in the manufacture of furniture and other articles, now cxclusively made of wood, calis ttention to tho resources aftbrdcd by Northern Canada for the best pulpmáking woods. It is found that in some localities thg foresta are now at the best ago for tfülping purposes and capablo of yielding from forty to 120 cords per acre, if tho wliolo of the timber were uülized. By mixing tho pulp with cfáys, atealite, asbestos, plumbago, mica, etc. , iubstances of cvery posiole color and compactness may be produced. A mirror is a frlend tliat :i wonian turns her back on wlien It tells lier tlmt f he is growing old.

Article

Subjects
Ann Arbor Courier
Old News