Correspondence
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.
Comments on manuscirpt
On Costello's "Methods for obtaining and handling marine eggs and embryos" (MBL Woods Hole 1957). On Holtfreter's upcoming embryology course at the Bermudas.
On general trends in embryology. On Kuehn. On Rita Levi-Monatlcini's new research program: "Rita is moving into a combination of neuro-embryol. And neuro-physiol. (electro-) with the enthusiastic help of our Chilean friend Nanno Orrego (...)."
On his plans for essays on the history of the organizer. On Holtfreter's work on the organizer with Spemann, Mangold et al. in 1932.
On Hamburger's corrections of Holtfreter's manuscript. On visiting Max Delbrueck at Nashville, Tennessee.
Typewritten letter, 2 pages
Typewritten letter, 1 page
Scheduling meeting
Typewritten letter, 1 page
Notification of appointment as Research Associate in Zoology in 1964.