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).
Comparison table of heat dissipation for different matrices.
| Identifier | ExFiles\Box 150\2\ scan0070 | |
| Date | 4th July 1938 | |
| TABLE OF MATRIX HEAT DISSIPATIONS COMPARED. 4th. July 1938. Matrix tested. | Heat dissipation (HP) per sq.ft.frontal area per 100°F temp.diff. | Heat dissipation (HP) per cu.ft. matrix vol. per 100°F. {Mr Friese} temp.diff. | Heat dissipation (HP) per lb. matrix weight per 100°F temp.diff. Marston Mk.VI. 3.22 sq.ft. frontal area 2.050" deep (26lbs) | 18.7 | 109.0 | 2.31 Harrison Mk.VI. 3.22 sq.ft. frontal area 2.050" deep (26lbs) | 19.9 | 116.2 | 2.46 Gallay. 3.18 sq.ft. frontal area. 1.970" deep. | 19.4 | 117.8 | - Serck. 3.725 sq.ft. frontal area. 2.19" deep (26lbs) | 20.8 | 113.6 | 2.18 NOTE. All comparisons made with .296" H2O static pressure difference across matrix. | ||