EFFECTS OF THYMECTOMY 85 



thymectomy were to lead to increased calcium excretion Effects of 

 and bone softening, the growth of the genital gland 



which promotes the excretion of calcium would not tend and 



metabolism. 

 to improve matters, unless and this is possible the 



development of the genital gland causes an increased 

 secretion from the suprarenals, which may promote 

 calcium retention. 



EFFECTS OF THYMECTOMY ON THE HORMONOPOIETIC 



ORGANS 



No reliable work appears to have been done on these Thymectomy 

 lines. It is urgently needed, in order to clear up many 

 of the difficulties concerning the relation of the thymus r ga ns - 

 to the general metabolism. 



THE PHYSIOLOGICAL EFFECTS OF EXTRACTS OF THE 

 THYMUS 



So far as I am aware, experiments have chiefly been Effects of 

 conducted in regard to the effects of feeding with the'thynms. 

 thymus substance. 



These experiments are not worth detailed considera- 

 tion as the findings are entirely conflicting. Some 

 observers state that development in larvae and young 

 animals is delayed, others that the results are negative. 

 Ott and Scott 1 , however, state that injections of thymus 

 extract excite the secretion of milk. 



1 Ott, L, and J. C. Scott, Therap. Gaz., 1912, vol. xxxvi, p. 761. 



