Free and Discounted Ebooks
Join 130,000 readers! Get our ebook deals straight to your inbox.

Scientific American Supplement, No. 392

July 7, 1883

Cover image for

Download


Author: Various Authors
Published: 1883
Language: English
Wordcount: 40,305 / 126 pg
Flesch-Kincaid Reading Ease: 35.4
LoC Category: Q
Downloads: 608
mnybks.net#: 360
Origin: gutenberg.org
Genres: Periodical, Science
Excerpt

we have a longitudinal neutrality produced in the same rod when placed magnetic west, the polarity in the latter case being transversal.

In all these cases we have a perfectly symmetrical arrangement, and I have not yet found a single case in well-annealed soft iron in which I could detect a heterogeneous arrangement, as supposed by Ampere, De la Rive, Weber, Wiedermann, and Maxwell.

We can only study neutrality with perfectly soft Swedish iron. Hard iron and steel retain previous magnetizations, and an apparent external neutrality would in most cases be the superposition of one magnetism upon another of equal external force in the opposite direction, as shown at B, Fig. 1. Perfectly soft iron we can easily free, by vibrations, from the slightest trace of previous magnetism, and study the neutrality produced under varying conditions.

[Illustration: FIG. 1.]

If we take a flat bar of soft iron, of 30 or more centimeters in length, and hold it vertically (giving while thus held a few torsions, vibra

SUBSCRIBE TO MANYBOOKS 

FREE EBOOKS 

Join 120,000+ fellow readers! Get Free eBooks and book bargains from ManyBooks in your inbox. 

We respect your email privacy

(advanced)
login | register

User ID

Password

reset password

Author of the Day

Kathleen C. Perrin
Frequently wandering the stone streets of Mont Saint Michel in France as a tour guide has given author Kathleen C. Perrin a unique insight and special bond with the place. It has also allowed her to channel her passion for the place into her young adult historical paranormal series, The Watchmen Saga. In this interview she talks about her muse, how she retraces the footsteps of her characters to better understand them and the hardships of life in 15th-century France.
Read full interview...