Title: An experimental examination into the growth of the blastoderm of the chick
Abstract: In making an experimental study of the growth of the blastoderm of the chick, I had two chief objects in view: (1) To test by actual experiment Duval’s theory of the formation of the primitive streak. (2) To try and determine experimentally whether the whole or only part of the actual embryo is developed by the activity of the primitive streak. And further, if only a part, to determine its limits.