Influence of Corpus Inteuin Extmcts upon IMuiii Muscle 21 



until the supLTnatant tluiil shmved no Ji[)precial)lu yellow colouring. The 

 solutions thus obtained were mixed, evaporated to dryness over a water- 

 bath, and an extract made from the dried residue )jy boilin;j for a few 

 minutes with Locke solution. The extract was filtered. The residue of 

 corpus luteum, after extraction with alcohol, was dried in an incubator at 

 37** C, the fats and lipoids being in some ca.ses first removed by chloro- 

 form ; occasionally Soxhlet's extraction apparatus was used. The results 

 of the te.sting of the various extmcts upon the uterus are shown in the 

 following tables (X\'. and X\'I.): — 



Table XV. 



