Some Chemical and Physiological Properties of the Hormone of the Liquor Folliculi*

Since the title of this paper may give rise to the question of whether or not the active principle of the placenta and corpus luteum differs from that of the liquor folliculi, we may state at the outset that such physiological data as are available and such chemical data as are admissible for deciding the question indicate the probable identity of the hormone from the three sources. Due to the failure as yet of chemical isolation of the hormone from any source and to the fact that it seems better to us to refrain from a name until a logical one based on its chemical constitution can be given, and since all of the observations described in this paper were made upon liquor folliculi from hog ovaries, we prefer to refer to the product with which we are working as the hormone of the liquor folliculi.