Scientific American Supplement, No. 620, page 1 by Various Authors
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ducing the principle of the band saw, and producing a horizontal cut--10 illustrations. 9896
V. ELECTRICITY.--A Current Meter--The Jehl & Rupp meter for electricity described--1 illustration. 9903
Mix & Genest's Microphone Telephone--The new telephone recently adopted by the imperial post office department of Germany--3 illustrations. 9902
Storage Batteries for Electric Locomotion--By A. RECKENZAUN--A valuable paper on this subject, giving historical facts and working figures of expense, etc. 9903
The Telemeter System--By R.F. UPTON--The system of Ö.L. Clarke, of New York, as described before the British Association--A valuable tribute to an American inventor--1 illustration. 9900
VI. METALLURGY.--The Newbery-Vautin Chlorination Process--A new process of extracting gold from its ores, with details of the management of the process and apparatus--1 illustration. 9907
VII. MISCELLANEOUS.--A Gigantic Load of Lumber--The largest barge load of lumber ever shipped--The barge Wahnapitæ and her appearance as loaded at Duluth--1 illustration. 9907
Apparatus for Exercising the Muscles--An appliance for use by invalids requiring to exercise atrophied limbs--1 illustration. 9908
Practical Education.--A plea for the support of manual training schools. 9906
Waves--The subject of ocean waves fully treated--An interesting resume of our present knowledge of this phenomenon of fluids. 9906
VIII. NAVAL ENGINEERING--The New Spanish Armored Cruiser Reina Regente.--Illustration and full description of this recent addition to the Spanish navy.--1 illustration. 9895
The Spanish Torpedo Boat Azor--Illustration and note of speed, etc., of this new vessel--1 illustration. 9895
IX. OPHTHALMOLOGY--The Bull Optometer--An apparatus for testing the eyesight.--The invention of Dr George J. Bull.--3 illustrations. 9908
X. SANITATION AND HYGIENE--The Sanitation of Towns--By J. GORDON, C.E.--A presidential address before the Leicest