Scientific American Volume Xliii No 25 December 18 1880 A Weekl

A practical mechanic communicates to the Scientific American the following: In hardening and tempering a cold chisel care should be taken to have a gradual shading of temper. If...

Again, when these undulations in the ether fall upon other molecules the latter may reflect them away or they may absorb them, in which case the absorbing molecules are themselv...

This school was established in 1858, under the name of Bryant, Stratton & Packard's Mercantile College, by Mr. S. S. Packard, the present proprietor. It formed the New York link...

In the engraving, which is a sectional view, the cylinder of an air compressor is represented, on the end of which there is a ring containing delivery ports, through which the a...

An American missionary, Miss Norwood, of Swatow, recently described in a _Times_ paragraph how the size of the foot is reduced in Chinese women. The binding of the feet is not b...

But some will say this may be true of animal life, but not of plant life. That there is a strong and evident analogy, the one with the other, is now universally admitted by phys...

(2) R. L. J. asks how to make copying black and red inks. A. 1. Bruised Aleppo nutgalls, 2 lb.; water, 1 gallon; boil in a copper vessel for an hour, adding water to make up for...

"Gents: I have never before given a testimonial, but am willing to encourage the use of an honest remedy. I am so Pleased with your Hair Brush that I deem it my duty to write yo...

Parties who have used it constantly for six years testify that it will do _double_ the work of _any other Crusher_, with one-third the Power, and one-half the expense for keepin...

Air engine, new 385 Amateur mechanics* 390 American Institute of Architects 389 Architects, American Institute 389 Arctic winter, characteristics of 393 Aquarium (29) 395 Balanc...

Alloy for coating metals, J. B. Jones 234,482 Axle box, car, H. Hazel 234,568 Bag holder and truck therefor, L. H. Aldrich 234,381 Baling press, W. Duke 234,549 Band cutting and...