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).
Diagram showing the position of thermocouples in an India IV cylinder head.
| Identifier | ExFiles\Box 19\7\ Scan138 | |
| Date | 21th April 1929 | |
| V623. STD. COPPER ASBESTOS WASHER BETWEEN PLUG AND THERMO COUPLE THERMO COUPLE IN CONTACT WITH BRONZE PLUG, BUSH LEAD TO GALVANOMETER INDIA IV CYL. HEAD - POSITION OF THERMO COUPLES. 21/4/29 | ||