Charles Scribner’s Sons, New York, 1957, reprint.  Former school library book with associated treatments, reinforced binding.  ISBN 0-684-13154-4.  Hard cover, 276 pages including Index.  Very good; teal coloured boards with light edge wear; binding sound; school stamp on upper and lower page block, bit of foxing on outer page block.  Very good price-clipped dust jacket with clear protective cover.  Interior clean and unmarked except for usual library identifiers, borrowing slip and pocket on rear end paper.  Black & white illustrations by the author.  ‘… there is much useful and interesting information about electronic devices, as well as detailed directions and working drawings for easily made radio receivers and such electronic apparatus as transistor amplifiers, a transistor code oscillator, “electric-eyes,” electronic phonographs, Geiger counters, capacity operated relays, phono-oscillator, and so forth.’ (from front flap)