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Notes from Oscar Schotte's lecture. Trinkaus draws 6 diagrams of fertilization and the first cell division.
Signed "J. Philip Trinkaus, M.B.L., 1939, Embryology, I"
Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the development of the egg with information on 'internal potencies', 'visibles structure', and 'Invisible structure', then begins a new section on 'External Factors" with a diagram of a two-cell embryo
Notes from Hubert Goodrich's lecture, 'Historical Phases of Embryology". Trinkaus notes three phases: descriptive, evolutionary, and analytical, and gives notes on each
Notes from Viktor Hamburger's lecture. Trinkaus begins notes on the "Formation of the Spermatophore" with a diagram and discussion of the "Process of Ejaculation" most likely in the squid
Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the process of ejaculation, including a diagram
Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the the structure of the echinoderm egg, with two diagrams, then begins notes on insemination in starfish with a diagram
Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the echinoderm egg with the determination that "Therefore this determining subst. is located in something other than pigment." He creates four categories for his notes on this page: 'Micropyles', 'Position of the Germinal Vessicle', 'Polar Bodies', and 'Fixation of Oocytes on the walls of the Ovary'
Notes from Hubert Goodrich's lecture. Trinkaus' notes on 'Types of eggs', 'Egg membranes', and 'Spawning periods'
Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the history of research on echinoderms, including information on Jacques Loeb, Hans Driesch, and Theodor Boveri. Trinkaus begins notes on the "Development of the Egg" with information on "inherent factor or potencies (Internal factors)"
Notes from Oscar Schotte's lecture. Trinkaus begins notes on the 'metamorphosis of Echinoderms' with four diagrams of an echinoderm 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)