Chapter IV: PHYSICS, ELECTRICITY, LIGHT, ETC.--Apparatus for Measuring
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the Force of Explosives.--With engraving.
Lighting and Ventilating by Gas.--Advantages of gas over
electricity, etc.--By WM. SUGG. 2 figures.
Ander's Telephone. 1 figure.
Brown's Electric Speed Regulator. 1 figure.
Magneto-electric Crossing Signal. 2 figures.
The Chromatoscope.--An aid to microscopy.
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Scientific American Supplement, No. 514, November 7, 1885Chapter IV: PHYSICS, ELECTRICITY, LIGHT, ETC.--Apparatus for Measuring
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