Admiralty, Torpedo and Mining Dept.NAVAL ELECTRICAL POCKET BOOK. B.R. 157/1933 bound with ADDENDUM NO. 2 TO B.R. 157/1933. B.R. 157 (2) King's Printer, Ottawa, 1943. 92 pp + 399 pp, 6 1/2" H, stiff navy blue card covers with cloth spine. Many b&w drawings/diagrams - some fold-out. From title page: "Reproduced as amended in Canada (Jan. 1943) by the King's Printer, Ottawa, with permission of the Controller, H.M . Stationery Office, London, for the exclusive use of His Majesty's Canadian Naval Forces. 1941. Note. - In this Addendum is included Addendum No.1, so that the latter may now be destroyed. Addendum No. 3 amending Addendum No. 2 has been i n c o r p o r ated in this reprint." The section headings include: Measuring and Testing Instruments and their Use; Dynamos, Motors and Controllers, etc.; Supply of Light and Power; Incandescent Lighting; Bells, Rattlers, Buzzers and Hummers; Tel ep ho ne s, F ir e Co ntrol; Gun Firing and Night Sight Circuits; etc., etc. Colored crayon notation and ink stamp on front endpapers, one fold-out page is mis-aligned and creased, erased color pencil notation on one fold-out page, ink notation on am end men ts pag e, li ght edge wear and scuffing, light browning to pages, minor soiling, darkening and soiling to edges of text block. Good reading copy only.