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Scientific American Supplement, No. 794, March 21, 1891   By:

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NEW YORK, March 21, 1891

Scientific American Supplement. Vol. XXXI., No. 794.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


I. BOTANY. New Race of Dwarf Dahlias. A new and valuable flowering plant, with portrait of the introducer. 1 illustration.

II. CHEMISTRY. Carbon in Organic Substances. By J. MESSINGER. An improved method of determining carbon by inorganic combustions. 1 illustration.

III. CIVIL ENGINEERING. A New Integrator. By Prof. KARL PEARSON. M.A. An apparatus for use for the engineer in working up areas, indicator diagrams, etc. 4 illustrations.

Best Diameter of Car Wheels. The size of car wheels from the standpoint of American engineering. A plea for a moderate sized wheel.

Improved Overhead Steam Traveling Crane. A crane constructed for use in steel works. Great power and range. 3 illustrations.

Some Hints on Spiking Track. A most practical article for telling exactly how to conduct the operation on the ground. 1 illustration.

IV. ELECTRICITY. Electrical Laboratory for Amateurs. By GEO. M. HOPKINS. A simple collection of apparatus for conducting a complete series of electrical experiments. 17 illustrations.

The Action of the Silent Discharge on Chlorine. How an electric discharge affects chlorine gas. An important negative result.

V. ETHNOLOGY. Some Winnebago Arts. An interesting article upon the arts of the Winnebago Indians. A recent paper before the New York Academy of Sciences.

VI. MEDICINE AND HYGIENE. The Philosophy of Consumption. By Dr. J.S. CHRISTISON. A review of the present theories of consumption, and the role played in it by its bacillus.

VII. MUSIC. Spacing the Frets on a Banjo Neck. By Prof. C.W. MACCORD. A most practical treatment of this subject, with full explanations. 1 illustration.

VIII. ORDNANCE. High Explosives in Warfare. By Commander F.M. BARBER, U.S.N. An elaborate review of modern explosives in their applicability to ordnance, etc.

The Experiments at the Annapolis Proving Grounds. The recent tests at Annapolis described and illustrated. Views of the projectiles, plates, etc. 3 illustrations.

IX. PHYSICS. Aræo Picnometer. An entirely novel form of hydrometer, of very extended use and application. 1 illustration.

X. TECHNOLOGY. Fabric for Upholstery Purposes. Full technical description of the method of producing a new and characteristic fabric. 1 illustration.

Gaseous Illuminants. By Prof. VIVIAN B. LEWES. Continuation of this important article, treating of the water gas and special processes, with analyses.

Glove Making. Early history of glove making in America. Its present aspects and processes.

Reversible Ingrain or Pro Brussels Carpet. An imitation of Brussels carpet on the Ingrain principle. Full description of the process of making. 3 illustrations.

The Manufacture and Use of Plaster of Paris. An excellent treatment of a subject hitherto little written about. Full particulars of the manufacturing process.


We show in Fig. 1 a general view, and in Figs. 2 and 3 a side elevation and plan of an overhead steam traveling crane, which has been constructed by Mr. Thomas Smith, of Rodley, near Leeds, for use in a steel works, to lift, lower, and travel with loads up to 15 tons. For our engravings and description we are indebted to Industries. The crane is designed for hoisting and lowering while traveling transversely or longitudinally, and all the movements are readily controlled from the cage, which is placed at one end of and underneath the transverse beams, and from which the load can be readily seen... Continue reading book >>

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