Descrizione

7 vols., [of 9], 8vo., with illustrations and diagrams in the text, numerous errata slips pasted in text as appropriate; original blue wrappers, wire-stitched as issued, covers lightly dust-soiled else a very good, clean collection. The collection comprises A1: Magnetism and Electricity; A3: Technical Terms; A4: Test Boards; A5: Protective Fittings; A6: Measuring and Testing Instruments; A7: Sensitivity of Apparatus; A9: Standard Graphical Symbols for Telegraphy, Telephony abnd Radio Communication. This series wants only A2: Primary Batteries; A8: Standard List of Terms and Definitions used in Telegraphy and Telephony. With several errata slips pasted in text as appropriate. Pamphlets A8 and A9, issued solely for internal distribution, are particularly scarce. GROUP COLLECTIONS OF THIS NOTABLE AND HISTORIC SERIES ARE VERY SCARCE.