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).
Graph showing the results of Smith's Calorstat tests with special fillings.
| Identifier | ExFiles\Box 39\4\ Scan214 | |
| Date | 23th October 1930 | |
| SMITH'S CALORSTAT TESTS CALORSTATS WITH SPECIAL FILLINGS SPECIAL FILLING 'H' SPECIAL FILLING 'A' SPECIAL FILLING 'B' SHUTTERS CLOSED POSITION 'SHUTTERS OPEN' POSITION TEMP. °C PULL LB. PUSH. LB. | ||