- ^ Milton، J.H. (1953). Marine Steam Boilers. Newnes. صفحات 216–219.
- ^ "Trial of HMS Rattler and Alecto". April 1845.
The very lowest pressure exhibited "when the screw was out of the water" (as the opponents of the principle term it) was 34 lb, ranging up to 60 lb., on Salter's balance.
- ^ Safety valve sized regarding hot CIP -> Cold water conditions