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Caspar had recently completed his PhD in biophysics at Yale University, on the topic of TMV, and heard of Franklin's work through James Watson. In this letter he summarized his findings and asked to compare these to her X-ray diffraction results.
Original Repository:
Churchill Archives Centre. The Papers of Rosalind Franklin
Location:
Folder: 2/33
Rights:
Reproduced with permission of Donald L. D. Caspar.