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).
Instruction sheet detailing the calculation for the resistance of a Weston Galvanometer.
| Identifier | ExFiles\Box 33\4\ Scan217 | |
| Date | 28th April 1924 | |
| RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X. 1782 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Order No. WA{Mr Wallis} 25 Customer's No. X 1782 Resistance of Weston Galvanometer Reading in divisions on Galvo^n = 21.0 = 21 x 32 micro amperes = .672 milliamperes Reading on 22407 as milli-voltmeter = 25.9 divs = 12.85 millivolts ∴ Resistance = 12.85 / .672 = 19.1 ohms at 17°C Signed H.E.W This Sheet must be filed on completion of the work. | ||