Correspondence
On Caspari's concept of differentiation.
On the outline of their book. On a proposed paper on the significance of the cell membrane in development. On a paper for the upcoming Growth Meeting in Oxford.
On Mascona. On Paul Weiss. On Trinkaus and his own research program: "I cannot see too much sense in the gospel of Trinkaus that it is most important to analyze embryonic determination in terms of cytological rather than histological events. My objection is that the embryo, my teacher, does think in terms of germ layers, even the whole organism and not primarily in terms of individual cells and their subunits." Programmatic letter, mainly on the historical intellectual roots of Holtfreter's research program.
Review of "Analysis of Development".
On applying for US immigration visa.
On his NSF grant application. On his recent paper on thymidine and cell adhesion. On radioactive labelling methods. On Hiroko Holtfreter's studies on the field properties of the organizer. In this letter Johannes Holtfreter claims that he has written Hiroko Holtfreter's thesis. On Caspari and Paul Weiss.
On culture media for studying differentiation of the organizer. On the natics of frogs, mice and monkeys.
On Hiroko Holtfreter's upcoming PNAS publication. On Lovtrop's recent research & publications on birth defects.
On getting material for his Embryology course. On Claude and Chargaff and induction. On upcoming collaborations.
On his difficulties at University of Rochester. On his recent trips to Germany and Paris. On his experiments with Pleurodales eggs at Gallion's lab at Sorbonne Paris.
Holtfreter's general evaluation of Holtfreter's & Hamburger's chapter in 'Analysis of Development'.
On Holtfreter's Bali pictures. On his plans visiting the US.
On his job prospects in the US.
On reading Thoreau's "Walden". On the ph stability of different structures.
On literature for the chapter on induction and his own chapter.
On Hamburger's upcoming visit at McGill.
On job offers in the US (including an assistant professorship with Curt Stern). Letter has several important remarks on the outline of his theoretical work. "My reluctance to give up research at this moment derives from the feeling that lately several threads have come together in my hands, threads, which, I think, can be woven into a nice pattern of a synthesis of some important embryological processes." "We should really know a bit more about the physico-chemical properties of the living matter."
On keeping a frog colony in his Rochester lab. On frog development. Critical remarks on Locke's editorial work.
On the plan to publish a collaborative book on "Analysis of Development" with Weiss et al. On his upcoming papers on cell polarity & mechnaics of neuralization. On Roy Gillettte.
On becoming Tracy H. Harris Professor of Zoology in 1964. On Holtfreter's paper dedicated to Hamburger's 65th birthday. On a conference on "Epithelial-mesenychmal interactions". On Rolf and Eveline Lehmann from Freiburg visiting Holtfreter's lab.
Invitation to Montreal. On his difficulties visiting the US.
On teaching undergraduates. On prospective successors of Curt Stern.
Programmatic letter on Holtfretrer's conception to embryology. On recent experimental results on egg polarity.