Scientific American Supplement, No. 392, July 7, 1883

By Various

Book Id: WPLBN0000614191
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Title:	Scientific American Supplement, No. 392, July 7, 1883
Author:	Various
Volume:
Language:	English
Subject:	Literature & thought, Literature and history, Literature & philosophy
Collections:	Classic Literature Collection, Project Gutenberg Consortia Center
Historic Publication Date:
Publisher:	Project Gutenberg Consortia Center


Citation APA MLA Chicago Various, B. (n.d.). Scientific American Supplement, No. 392, July 7, 1883. Retrieved from https://self.gutenberg.org/

Excerpt
The continuous current and the alternating current generators invented by Dr. J. Hopkinson and Dr. Alexander Muirhead are peculiarly interesting as being probably the first in which the bobbins of the armature were wound with copper ribbon and arranged on a disk armature much in the same way as was afterward done by Sir William Thomson and by Mr. Ferranti. In the Muirhead-Hopkinson machine the armature coils are attached to a soft iron ring, whereas in the Ferranti the iron core is dispensed with, and a gain of lightness in the armature or rotating part effected; this advantage is of considerable importance, though Messrs. Hopkinson and Muirhead can of course reduce the weight of this iron core to insignificant proportions.

Table of Contents
CONTENTS. I. ELECTRICITY AND MAGNETISM.--Improved Dynamo Machine. Eight figures. An Improved Manganese Battery.--By GEO. LEUCHS. The Cause of Evident Magnetism in Iron, Steel, and other Magnetic Metals.--By Prof. D. E. HUGHES. Neutrality.--Superposed Magnetism.--Elastic Nature of the Ether Surrounding the Magnetic Molecules. 3 figures. II. ENGINEERING.--The Westinghouse Brake. 2 figures. Hydraulic Elevators and Motors.--By B. F. JONES.--Bearing upon the Water Supply of Cities.--Cost of Water used.--Objectionable effects on Water Works.--Best method of arranging water supply.--Cause of Accidents.--Advantages of Water Motors over Steam Engines.--Rates for Water Motors. Water Supply of Small Towns.--Process of Softening Hard Water. Six figures. Improved Water Meter. Several figures. III. TECHNOLOGY.--Washing Machine for Wool. 1 figure. Increasing the Illuminating Power of Gases, etc.--By V. POPP.-- 3 figures. Preventing Iron from Rusting. 3