the donor suffers no ill-effects, except that rest for 

 a few days is desirable. In many cases, however, 

 especially if older children or adults are to be trans- 

 fused, it would be well to provide two donors, either 

 simultaneously or successively. But probably it is 

 not necessary to transfuse large quantities. We have 

 seen that quite a trifling addition of normal blood 

 will make it possible for haemophiliac blood to clot 

 promptly, and there is no need in most cases to do 

 more than stanch the bleeding. Rest, fresh air, 

 plenty of fluids, and iron, will speed the convalescence. 



THE THERAPEUTICS OF CALCIUM SALTS. 



So much interest has lately attached to this subject 

 that brief mention only will be called for of the uses 

 to which calcium salts have been put. It has long 

 been recognized by physiologists that they are 

 essential to the continued success of perfusion fluids, 

 and now we know that they control the coagulation 

 and viscosity of the blood, and probably the functions 

 of the ovary and parathyroid glands also. 



Remarkable results have been obtained in many 

 cases by giving calcium lactate in i5-grain doses 

 three times a day, for three days only, in the following 

 conditions. 



Transient or functional albuminuria. 



" Lymphatic " headache frequently recurring in 

 anaemic young women. 



Some urticarial eruptions. 



Chilblains. In this common complaint it may 

 work like a charm. 



All varieties of tetany. 



