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).
Table of flux density values for various electrical motor or generator components.
| Identifier | ExFiles\Box 179b\2\ img130 | |
| Date | 12th November 1932 guessed | |
| -3- Flux Densities. Yoke 15,700 lines per sq.cm. Pole core 18,300 " " " Air gap 6,980 " " " Armature core 13,400 " " " Armature teeth 15,400 " " " Hs{Lord Ernest Hives - Chair}/Wst. | ||