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).
Request to order a Coddington magnifier for analysing aero sparking plug failures.
| Identifier | ExFiles\Box 58\2\ Scan193 | |
| Date | 10th May 1935 | |
| ~6000 EJJ. From Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.4/MA.10.5.35. MAGNIFIER FOR ANALYSING PLUG FAILURES. We require a high power magnifying glass to examine mica pin holes and lead deposit on aero sparking plugs. Will you therefore please order for us one Coddington magnifier No.2076 1" dia. lens as illustrated in W.J.George's catalogue. Hs{Lord Ernest Hives - Chair}/Wst. | ||