New York 1933 - 1937 first edition. Bell Laboratories. 4to. wraps. Orange covers. 25 separate issue of Bell laboratories Record . About 30 pages per issue. Lots of photo illustrations of early telephones, radios and other electronic equipment. Articles include: "Telephone for Use in Explosive Atmospheres" by Hayward; "Testing in Explosive Atmospheres" by C H Wheeler; Feedback Amplifiers by H S Black; "Joints in Submarine Cable" by Malm; "Early Handsets" by Frederick; etc. All have light contemporary research laboratory stamp on front but no other marks. VG to near Fine. Set of 25 magazines. Bookseller Inventory #
Title: BELL LABORATORIES RECORD - 25 SEPARATE ...
Publication Date: 1933
Book Condition: VG
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