112 INTERNAL SECRETIONS OF THE OVARY 



Table 8. — Yields of Q^strin from various Sources. 



(continued) . 



the water lily, though giving a definitely positive reaction, 

 have only about i m.u. per kg. According to Glimm and 

 Wadehn (247), and to Dohrn, Poll, and Blotevogel (163) oestrin 

 is present in appreciable quantities in yeast and potatoes. It 

 should be emphasized again, however, that the production of 

 oestrin from such anomalous sources must be confirmed in 

 every possible manner before being fully accepted, especially 

 as the prooestrous smear is considered to indicate a positive 

 result by various workers, including Loewe. 



