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Scientific American Supplement, No. 611, September 17, 1887   By:

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[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 611

NEW YORK, SEPTEMBER 17, 1887

Scientific American Supplement. Vol. XXIV., No. 611.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.

PAGE I. BIOGRAPHY. The New Statue of Philip Lebon. Biography of the French pioneer inventor of gas lighting, with notes on the recent inauguration of his statue. 1 illustration. 9757

II. CHEMISTRY. The Analysis of Urine. An elaborate investigation of the method of analyzing chemically and microscopically this fluid, with illustrations of the apparatus employed. 4 illustrations 9758

III. ELECTRICITY. Electrical Alarm for Pharmacists. An apparatus for indicating to the pharmacist when he removes from the shelf a bottle containing poison. 2 illustrations. 9753

Electric Steel Railways. By GEORGE W. MANSFIELD. A full discussion of the problem of electric railways; comparison with horse and cable traction. 9752

IV. ENGINEERING. Improved Oscillating Hydraulic Motor. A small motor for household use, as for driving sewing machines and other domestic machinery. 8 illustrations. 9751

The Ceara Harbor Works. A remarkable engineering work now in progress in Brazil; the formation of an artificial harbor. 4 illustrations. 9752

V. GEOLOGY. Notes of a Recent Visit to Some of the Petroleum Producing Territories of the United States and Canada. By BOVERTON REDWOOD, F.I.C., F.C.S. The second portion of this valuable paper, treating more particularly of Canadian petroleum. 9765

VI. METEOROLOGY. The "Meteorologiske Institut" at Upsala, and Cloud Measurements. The methods used and results attained in the famous Upsala observatory under Profs. Ekholm and Hagström; the measurement of clouds. 1 illustration. 9764

VII. MISCELLANEOUS. Drawing Instrument for Accurate Work. By J. LEHRKE. A magnifying instrument for fine work and measurements. 2 illustrations. 9754

Liquid and Gaseous Rings. Notes on the production of vortex rings. The different aspects and breaking up of smoke rings. 6 illustrations. 9760

Scenes among the Extinct Volcanoes of Rhineland. The picturesque features of the geological formations of this region described. 10 illustrations. 9762

Shall We Have a National Horse? An eloquent plea by RANDOLPH HUNTINGTON for the production of a good type of animal. Use of the Arabian horse as an improver of the breed. 9760

VIII. NAVAL ENGINEERING. Trial Trip of the Ohio. The remarkable results attained by the introduction of new boilers and machinery in an American steamship. 9751

IX. PHYSIOLOGY. Apparatus for Determining Mechanically the Reaction Period of Hearing. An interesting study of the time of transmission of an impulse through the sensor and motor nerves. 1 illustration. 9753

X. SANITATION. A New Disinfector. Description of a new apparatus for disinfecting by superheated steam and air, with tabular statement of elaborate tests made with it. 2 illustrations. 9754

Trees from a Sanitary Aspect. By CHARLES ROBERTS, F.R.C.S., etc. The sanitary value of trees considered by this eminent sanitarian. The uses and abuses of shade near houses. 9765

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