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).
Log of temperature readings from a series of vehicle ventilation tests.
| Identifier | ExFiles\Box 75\4\ scan0075 | |
| Date | 20th May 1912 guessed | |
| Condition of Ventilation | Atmos temp | Water temp | Floorboards Top | Floorboards under | Time in mins As No 7. 3 louvres on each side guard removed. | 18 | 75 | 22 | 29 | 0 | ⑧ | 18 | boiled | 22 | 31. | 4 | As No 8. Carb. side guard removed. | 19 | 75 | 21 ½ | 26 | 0 | ⑨ | 19 ½ | 94 | 20 | 29 | 10 | As No 9. Louvred bonnet fitted | 19 ½ | 75 | 24 | 32 | 0 | ⑩ | 19 ½ | 90 | 22 ½ | 33 | 10 | As No 10. bonnet completely removed. | 19 ½ | 75 | 29 ½ | 35 | 0 | ⑪ | 21 | 88 | 29 ½ | 36 ½ | 10 | | ||