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).
Chart recording of an electrical test, possibly a battery discharge, with handwritten calculations.
| Identifier | ExFiles\Box 54\1\ Scan286 | |
| Date | 16th August 1928 | |
| 16-8-28 156 S3 75 a.h. 103LBS. Average amperes = 6.32 Hours = 9.5 Ampere hours = 56.9 .552. 1.80w REGD. TRADE MARK. "MEGGER" | ||