From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
List of D.C. instruments and their principal uses for various tests.
| Identifier | ExFiles\Box 165\3\ img049 | |
| Date | 19th July 1923 guessed | |
| X.975. SL6033. X.975. D.C. INSTRUMENTS. Principal uses as follows:- 22407 - Extra volt ranges for all purposes. 22596 - Starter motor and accessories tests and miscellaneous purposes (amperes). 42 - Ignition etc. tests. (H.E.W.) 92 - Goshawk dynamo tests (F.J.A.) 40 - EAC. dynamo tests (C.A.P.) 98 - Battery tests (G.J.). | ||