A lively and accessible guide to the natural force of magnetism - what it is and how it works. Learn about how magnetism was discovered, how a compass works, and how to test magnetic fields. Fantastic hands-on projects show you how to make an electromagnet, a light switch, a magnetic fishing game and your own loop compass. ,
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.