Chapter IV: ELECTRICITY, MICROSCOPY, ETC.-Apparatus for demonstrating
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that Electricity develops only on the Surface of Conductors.--1
figure
The Colson Telephone.--3 engravings
The Meldometer.--An apparatus for determining the melting
points of minerals
Touch Transmission by Electricity in the Education of Deaf
Mutes.--By S. TEFFT WALKER.--With 1 figure
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Scientific American Supplement, No. 531, March 6, 1886Chapter IV: ELECTRICITY, MICROSCOPY, ETC.-Apparatus for demonstrating
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