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Scientific American Supplement, No. 647, May 26, 1888   By:

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SCIENTIFIC AMERICAN SUPPLEMENT NO. 647

NEW YORK, MAY 26, 1888

Scientific American Supplement. Vol. XXV., No. 647.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.

PAGE.

I. ARCHITECTURE. Elements of Architectural Design. By H. H. Statham. Continuation of this important contribution to building art, Gothic, Roman, Romanesque, and MediƦval architecture compared. 26 illustrations. 10339

The Evolution of the Modern Mill. By C. J. H. Woodbury. Sibley College lecture treating of the buildings for mills. 10329

II. CHEMISTRY. An Automatic Still. By T. Maben. An improved apparatus for making distilled water. 1 illustration. 10335

Testing Indigo Dyes. Simple and practical chemical tests of indigo products. 10342

III. CIVIL ENGINEERING. Railway Bridge at Lachine. Great steel bridge across the St. Lawrence near Montreal. 2 illustrations. 10333

IV. ELECTRICITY. Influence Machines. By Mr. James Wimshurst. A London Royal Institution lecture, of great value as giving a full account of the recent forms of generators of static electricity. 14 illustrations. 10327

V. HYGIENE. The Care of the Eyes. By Prof. David Webster, M.D. A short and thoroughly practical paper on the all important subject of preservation of sight. 10341

VI. MECHANICAL ENGINEERING. Economy Trials of a Non condensing Steam Engine. By Mr. P. W. Winans, M.I.C.E. Interesting notes on testing steam engines. 10331

The Mechanical Equivalent of Heat. By Prof. De Volson Wood. A review of Mr. Hanssen's recent paper, with interesting discussion of the problem. 10331

VII. METEOROLOGY. The Meteorological Station on Mt. Santis. A new observatory recently erected in Switzerland, at an elevation of 8,202 feet above the sea. 1 illustration. 10341

VIII. NAVAL ENGINEERING. Improved Screw Propeller. Mr. B. Dickinson's new propeller. Its form and peculiarities and results. 4 illustrations. 10333

IX. PHOTOGRAPHY. Manufacture of Photographic Sensitive Plates. Description of a factory recently erected for manufacturing dry plates. The arrangement of rooms, machinery, and process. 10 illustrations. 10336

X. TECHNOLOGY. Cotton Seed Oil. How cotton seed oil is made, and the cost and profits of the operation. 10335

Improved Dobby. An improved weaving apparatus described and illustrated. 1 Illustration. 10333

Sulphur Mines in Sicily. By Philip Carroll, U. S. Consul, Florence. How sulphur is made in Sicily, percentage, composition of the ore, and full details. 10334

The Use of Ammonia as a Refrigerating Agent. By Mr. T. B. Lightfoot, M.I.C.E. An elaborate discussion of the theory and practice of ammonia refrigerating, including the hydrous and anhydrous systems, with conditions of economy. 10337

INFLUENCE MACHINES.[1]

[Footnote 1: Lecture delivered at the Royal Institution, April 27, 1888. For the above and for our illustrations we are indebted to Engineering .]

BY MR. JAMES WIMSHURST.

I have the honor this evening of addressing a few remarks to you upon the subject of influence machines, and the manner in which I propose to treat the subject is to state as shortly as possible, first, the historical portion, and afterward to point out the prominent characteristics of the later and the more commonly known machines... Continue reading book >>


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