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Scientific American Supplement, No. 447, July 26, 1884   By:

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[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 447

NEW YORK, JULY 26, 1884

Scientific American Supplement. Vol. XVIII, No. 447.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.

I. CHEMISTRY. The Bitter Substance of Hops. By Dr. H. BUNGENER. What gives hops their bitter taste? Processes for obtaining hop bitter acid. Analysis of the same.

II. ENGINEERING AND MECHANICS. Improvements in the Harbor of Antwerp. With engraving of caisson for deepening the river.

Progress of Antwerp. Recent works in the harbor.

Bicycles and Tricycles. By C.V. BOYS. Advantages of the different machines. Manner of finding the steepness of a hill and representing same on a map. Experiments on ball bearings. The Otto bicycle.

The Canal Iron Works, London.

Marinoni's Rotary Printing Press. With 2 engravings.

Chenot's Economic Filter Press. With engraving.

Steel Chains without Welding. Method and machines for making same. Several figures.

III. TECHNOLOGY. Some Economic Processes connected with the Cloth Making Industry. By Dr. WM. RAMSAY. How to save and utilize soap used in wool scouring. To recover the indigo from the refuse. Extraction of potash from suint . Use of bisulphide of carbon.

IV. PHYSICS. ELECTRICITY, ETC. Thury's Dynamo Electric Machine. 5 figures.

Breguet's Telephone.

Munro's Telephonic Experiments. 9 figures.

Apparatus for Maneuvering Bichromate of Potassa Piles from a Distance. 2 figures.

Magnetic Rotations. By E.L. VOICE. 1 figure.

Lighton's Immersion Illuminator. 1 figure.

Foucault's Pendulum Experiments. By RICHARD A. PROCTOR. 4 figures.

V. ARCHITECTURE, ART, ETC. St. Paul's Vicarage, Forest Hill, Kent. 2 engravings.

Designs for Iron Gates. An engraving.

VI. ASTRONOMY. A New Lunarian. By Prof. C.W. MACCORD. With 3 figures.

VII. GEOLOGY. Coal and its Uses. By JAMES PYKE. Formation of carboniferous rocks and the coal in the same. Processes of nature. Greatness of this country due to coal. Manufacture of gas. Products of the same.

VIII. NATURAL HISTORY, BOTANY. ETC. The Wine Fly. The egg. Larva. Pupa and fly.

The "Potetometer." an Instrument for Measuring the Transpiration of Water by Plants. 1 figure.

Bolivian Cinchona Forests.

Ferns. Nephrolepis Davillioides Furcans and Nephrolepis Duffi. 2 engravings.

IX. PHYSIOLOGY, HYGIENE, ETC. The Upright Attitude of Mankind. Review of a lecture by Dr. S.V. CLEVENGER, in which he tries to prove that man must have originated from a four footed being.

Our Enemies, the Microbes. Affections caused by the same. Experiments of Davaine, Pasteur, and others. How to prevent bacterides from entering the body. 5 figures.

X. BIOGRAPHY. Gaston Plante, the Scientist. With portrait

Warren Colburn, the American Mathematician.

IMPROVEMENTS IN THE HARBOR OF ANTWERP.

The harbor of Antwerp, which, excepting those of London and Liverpool, is the largest in Europe, has been improved wonderfully during the last decade. Before 1870 it was inferior to the harbor at Havre, but now it far surpasses the same. The river Scheldt, which is about 1,500 ft. wide, was badgered out up to the vertical walls of the basin, so that the largest ships can land at the docks. The river was deepened by the use of caissons, in the lower parts of which the workmen operated in compressed air. The annexed cut shows that part of one of the caissons which projects above the surface of the water... Continue reading book >>


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