Photographs

Notes from Viktor Hamburger's lecture. Trinkaus begins notes on the "Embryology of the Trochophore" with two color diagrams and notes on gastrulation, then begins a section on "Derivatives of Trochophore"

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the derivatives of the endoderm, and begins notes on the cell lineage of each of the germ layers (includes cell lineage diagram), with information on '1st quartette", "2nd Quartette" and "3rd Quartette"

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the metamorphosis of the trochophore with a diagram and information about how it changes during development

Notes from Roberts Rugh's lecture. Trinkaus begins with an outline, "I. Injection of pituitary causes liberation of sperm within 24 hours in male frog" and "II. X Rays"

Notes from Donald Costello's lecture. Trinkaus continues his notes on fertilization from the previous page with information about "Polyspermy", "Pathological polyspermy", and "Specificity"

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the derivatives of the 2d cell, then makes a list of derivatives of the "4d cell", "From larva", and "Larval organs lost"

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on E.B. Wilson's cell lineage studies with six sets of diagrams showing cell division in Patella

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes onexperimental isolation of different pieces of the embryo (with diagrams) and notes on the effects of removing and rearranging cells in the embryo

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on different researchers approaches to experimental embryology with information about Tyler and Novikoff (includes diagrams)

Notes from Viktor Hamburger's lecture. Trinkaus concludes his notes for this lecture with a diagram of Crepidula

Notes from O. Schotte's lecture. Trinkaus begins his notes on "Potencies in Regenerating Tissue" with information on the process of development and begins a list of "Regenerative problems" with two points, "1. Causes of regeneration" and "2. Origin of the material of the blastema"