A. Hunter and W. R. Campbell aL Ole 
examine specimens of their blood. It is a pleasure also to ac- 
knowledge the courtesy with which Doctors B. P. Watson, K. 
C. Mellraith, A. McPhedran, G. W. Ross, W. B. Thistle, F. N. 
G. Starr, and G. A. Bingham, all of the staff of the Toronto 
General Hospital, permitted us to use material from the wards 
under their charge. 
