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).
Order of various types of wire for the Electrical Laboratory.
| Identifier | ExFiles\Box 63\1\ scan0195 | |
| Date | 26th March 1929 | |
| X3035 Roy.{Sir Henry Royce} from EFC. EFC3/T26.3.29. Will you please order for the Electrical Expl. Laboratory, the following :- 1/2 lb. of 26 S.W.G. D.C.C. copper wire. 1/4 " " 32 " D.S.C. Eureka wire. 1/4 " " 24 " D.C.C. Manganin wire. EFC. O/NX.735↑ | ||