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).
Quoting Mr. Royce's request for resistance data of alloys relative to copper to enable calculations.
| Identifier | WestWitteringFiles\D\May1920\ Scan14 | |
| Date | 26th May 1920 | |
| To EFC. from Rs.{Sir Henry Royce's Secretary} ORIGINAL. 2 Rs{Sir Henry Royce's Secretary}1/G22/5/20. 26. MAY 1920 X.1623 - RE RESISTANCE WIRES OF VARIOUS MATERIALS. RECEIVED With reference to your memo EFC/AT20/ which you query item (2) of R12/G15/5/20 relating to the above, would you kindly note that Mr. Royce replies as follows:- "We have many tables of the resistance of wires of different sizes in copper. If you could add to your list the numbers of times the resistance of each alloy compared with copper, we can readily refer to these tables of gauges, and length, and resistance, and make our multiplications." RS.{Sir Henry Royce's Secretary} | ||