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SCIENTIFIC.
MAKING INVISIBLE THREADS FROM ROCK CRYSTALS.
Mr. C. V. Boys, F.R.S., has recently been describing the improvements he has made in the suspending fibers used in the construction of the most exact scientific apparatus. In ...
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The microphone of Messrs. Mix and Genest, of 14A Neuenburgerstrass, Berlin, has lately undergone and important improvement. The sound-plate of this microphone consists of a ...
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(314 words)
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The material to be bent, as practised in Austria, is usually the red beech, a product of the Hungarian forests. In the United States the common beech and birch are used ...
[Article]
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A new gunpowder, the invention of Mr. He[?]st, has recently been tested, and the results point to it as a promising substitute for black powder for military and sporting ...
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After all, why not let the state elevate itself? Who is to condemn it if it uses its wings and flies? Social Politeness.—Excuse this bit of ...
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