Telegraphone Recording Wire (1 results)
Published by Smithsonian Institution, Washington 1901
Seller: Cosmo Books, Shropshire., United KingdomCosmo Books
Contact seller5-star sellerCondition: Used - Very good
£ 10.90
£ 11.90 shippingShips from United Kingdom to U.S.A.Quantity: 2 available
Booklet - Unbound Pages. Condition: Very Good. Hammer introduces the telephonograph (or telegraphone), an early magnetic soundâ'recording device, explaining its mechanism and potential applications. 6 Pages. An authentic standalone article, extracted from a larger volume. Not a reprint or reproduction, but an original work in it…s own right. Preserved in a modern card cover, prepared for practicality - an unassuming but serviceable presentation that favours function over finery. Size: 16 x 24 cms. Category: Smithsonian Institution; Cosmo Books : 29 years on ABE, 47 years taking care of customers. A bookseller you can rely on.
