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Thank-you note for Hamburger's laboratory outline on the production of double hearts. On the method of Graeper to produce double hearts in chick embryos. On his upcoming seminar on 'embryonic differentiation'.
On his summer travel plans.
Typewritten letter, 2 pages
On Hamburger's upcoming visit in Baltimore on January 18 & 19.
On Holtfreter.
Returning drawings by Holtfreter.
Requesting a draft of Hamburger's paper for the upcoming Dallas meeting of the American Association for the Advancement of Science.
On his immigration status. On a recent talk at the New York Academy.
On the London Ciba Symposium on neuro-embryology. On his vacation in Switzerland.
On the opening of Hamburger's new lab facilities. On Hamburger's upcoming talk at Rochester on "Embryonic beginnings of behaviour".
On Holtfreter's drawings and memorabilia of Edmund Husserl.
On Hamburger's paper in JEZ on behalf of Holtfreter's 65th birthday.