Page detailing deduction percentages for various volt and ampere range readings, with a note on instrument care.
| Identifier | ExFiles\Box 33\4\ Scan186 | |
| Date | 21th February 1920 guessed | |
| -3- 36. 150 volt range. Reading Deduct. 0 - 50 Correct. 50 - 150 .7% 37. 1.5 ampere range. Reading. Deduct. 0 - .5 Correct. .5 - 1.5 .7% 38. 15 ampere range. Reading. Deduct. 0 - 3.5 Correct. 3.5 - 12.5 .5% 12.5 - 15.0 .8% EFC. {E. Fowler Clarke - Electrical Engineer} Please in future take special care of instruments so as to reduce necessity of too frequent calibration. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).