()'-2^2 



p. (JOLDIIABER 



0.0 5 u/ml 



Fig. 26. Appearance of 2-\veek roller-tube cultures treated with various 

 concentrations of parathyroid extract and gassed with 50 per cent Oo. Gross 

 effects may be noted at the level of 0.1 u/ml and 0.5 u/ml. Microscopically, 

 0.05 u/ml of hormone caused some enhancement of resorption. 



