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).
Letter from Vacuum Oil Company regarding the relative values of lubricants with and without sulphur.
| Identifier | ExFiles\Box 145\1\ scan0234 | |
| Date | 18th September 1937 | |
| BY APPOINTMENT VACUUM OIL COMPANY LIMITED GARGOYLE REGD TRADE MARK TELEPHONE WHITEHALL 1010 (14 LINES) TELEGRAPHIC ADDRESS VACUUM PHONE LONDON CAXTON HOUSE . WESTMINSTER LONDON S W I REFERENCE OTJ. 18th September 1937 S. H.{Arthur M. Hanbury - Head Complaints} Grylls Esq., Rolls Royce Limited, DERBY. Dear Mr. Grylls, Replying to your letter of the 11th instant, it would be very difficult to determine, at any rate with an ordinary E.P. Testing Machine, the relative values of lubricants with and without the Sulphur as mentioned. I will ask our people to have test carried out, but our belief is that the sulphur is a very important factor. Unfortunately the Testing Machines are not a very accurate guide, so that the results which I hope to obtain for you would still want confirmation by practical tests on the gears themselves. Yours sincerely, O.{Mr Oldham} T. Jones OTJ ND [Handwritten Annotation: 1229] [Sticker: INTERNATIONAL MOTOR EXHIBITION CARS & BOATS OCT 14-23 EARLS COURT OUR STAND No. 228 FIRST FLOOR] UNLESS STATED OTHERWISE ALL OILS ARE QUOTED AND INVOICED PER UNIT GALLON OF 9 LBS. AND ALL QUOTATIONS ARE WITHOUT ENGAGEMENT. | ||