1. Normal blood coagulates in from two to four minutes in the standard capillary tube at a temperature of half blood heat. (185 C.) The apparatus for blood coagulability estimations can be obtained from Mr. A. E. Dean, 73, Hatton-garden, London, E.C.
2. I am indebted to my friend, Surgeon-Colonel E. Fairland, for the opportunity of studying this case.