NEW YORK, SEPTEMBER 28, 1889.
Reading edition
Scientific American Supplement. Vol. XXVIII., No. 717.
Scientific American, established 1845.
Scientific American Supplement, $5 a year.
Scientific American and Supplement, $7 a year.
TABLE OF CONTENTS.
PAGE
I. CIVIL ENGINEERING.—The Girard Hydraulic Railway.—One of the great curiosities of the Paris exposition, the almost frictionless railway, with sectional illustrations of its structure.—8 illustrations. 11451
II. ELECTRICITY.—Early Electric Lighting.—Electric lighting in Salem in 1859, a very curious piece of early history. 11458
Electric Motor for Alternating Currents.—A motor on an entirely new principle for the application of the alternating current with results obtained, and the economic outlook of the invention. 11458
Portable Electric Light.—A lamp for military and other use, in which the prime motor, including the boiler and the lamp itself, are carried on one carriage.—1 illustration. 11458
The Electric Age.—By Charles Carleton Coffin.—A short resume of the initial achievements of modern electricity. 11458
III. GEOLOGY.—The Fuels of the Future.—A prognosis of the future prospect of the world as regards a fuel supply, with a special reference to the use of natural gas. 11457
IV. MISCELLANEOUS.—Preservation of Spiders for the Cabinet.—A method of setting up spiders for preservation in the cabinet, with formulæ of solutions used and full details of the manipulation.—1 illustration. 11461
The Ship in the New French Ballet of the "Tempest."—A curious example of modern scenic perfection, giving the construction and use of an appliance of the modern ballet.—5 illustrations. 11450
V. NAVAL ENGINEERING.—Crank and Screw Shafts of the Mercantile Marine.—By G. W. Manuel.—This all-important subject of modern naval engineering treated in detail, illustrating the progress of the present day, the superiority of material and method of using it, with interesting practical examples.—1 illustration. 11448
Experimental Aid in the Design of High Speed Steamships.—By D. P.—A plea for the experimental determination of the probable speed of ships, with examples of its application in practice. 11449
Forging a Propeller Shaft.—How large steamer shafts are forged, with example of the operation as exhibited to the Shah of Persia at Brown & Co.'s works, Sheffield, England.—1 illustration. 11447
The Naval Forges and Steel Works at St. Chamond.—The forging of a piece of ordnance from a 90 ton ingot of steel, an artistic presentation of the subject.—1 illustration. 11447
VI. PHOTOGRAPHY.—The Pyro Developer with Metabisulphite of Potash.—By Dr. J. M. Eder.—A new addition to the pyro developer, with formulæ and results. 11462
VII. PHYSICS.—Quartz Fibers.—A lecture by Mr. C. V. Boys on his famous experiments of the production of microscopic fibers, with enlarged illustrations of the same, and a graphic account of the entire subject.—7 illustrations. 11452
The Modern Theory of Light.—By Prof. Oliver Lodge.—An abstract of a lecture by the eminent investigator and expositor of Prof. Hertz's experiments, giving a brief review of the present aspect of this absorbing question. 11459
VIII. PHYSIOLOGY.—Heat in Man.—Experiments recently made by Dr. Loewy on the heat of the human system.—Described and commented on by Prof. Zuntz. 11461
IX. SANITATION.—On Purification of Air by Ozone—with an Account of a New Method.—By Dr. B. W. Richardson.—A very important subject treated in full, giving the past attempts in the utilization of ozone and a method now available. 11460
X. TECHNOLOGY.—Alkali Manufactories.—Present aspect of the Leblanc process and the new process for the recovery of sulphur from its waste. 11457
Dried Wine Grapes.—The preparation of the above wine on a large scale in California, with full details of the process adopted. 11461
The Production of Ammonia from Coal.—By Ludwig Mond.—A valuable review of this important industry, with actual working results obtained in carrying out a retort process.—2 illustrations. 11454
Nature, Composition, and Treatment of Animal and Vegetable Fabrics.—The history of fabrics and fibers in the vegetable and animal world, their sources, applications, and treatments. 11453
Walnut Oil.—By Thomas T. P. Bruce Warren.—An excellent oil for painters' use, with description of a simple method for preparing it on a small scale. 11462