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).
Graphical chart recording the results of a battery discharge test.
| Identifier | ExFiles\Box 54\1\ Scan285 | |
| Date | 25th June 1928 | |
| Top line: 25-6-28 155 S2 75 a.h. 103 lbs Central data block: Average amperes = 6.06 Hours = 10.0 Ampere hours = 60.6 Other numbers on chart: -.589, 1.80v Faint text on right: RECORD MADE BY EVERETT, EDGCUMBE & CO., LTD., LONDON. | ||