Principles of Electricity Illustrated by Roy C. NorrisPrinciples of Electricity Illustrated A practical guide for beginners and more experienced craftsmen engaged in electrical work Edited by Roy C. Norris Odhams Books, c1950s, [First Edition], black and white illustrations and technical drawings, hardcover Good Condition, a little edge and shelf wear, a little rubbing and bumping ot edges, corners and covers, no inscriptions, small missing part from back endpaper and damage to pages 192 194, (see