Online Catalogue last updated 15th of September 2008
Pump current through a copper wire and you get a magnetic field. Wrap that copper wire into a coil, and the magnetic field intensity increases dramatically. You've created an electromagnet.
Good information about electromagnets and their design is hard to find. It's either far too simple, or it was written by a physicist building an atom smasher. Here you get a 1948 "text book" from International Correspondence Schools that delivers something in between.
Chapters include: electromagnetism, types of magnets used, forces developed from magnetism, magnet design procedure, and permanent magnets. You get a formula f or finding the pull of a magnet and a complete design section with curves, formulas, and examples for creating clapper, solenoids, e-types, AC and DC electromagnets. You also get useful characteristics of the different materials used in (1948) permanent magnets.
Great easy-to-read-and-understand info. Straight to the point. Build a huge electromagnet. Excellent little book. 5 1/2"x 8 1/2" softcover
Code No. 007764, 91 pages, $24.50