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DIRECTOR'S ROOM
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October 6
Naturforschende Gesellschaft
Dr. F. Drevermann Senckenbergische Viktoria-Allee 7 Frankfurt a. M., Germany
My dear Dr. Drevermann:
It was indeed a delight to receive your kind letter of September 17 as well as the iragazine giving an account of your visit here.
I have had photographs made of the most important of the Burkhardt pictures which were drawn during the time that Agassiz and his family and Burkhardt stayed in the little hut on the Aar Glacier studying its movements. I am also sending, because I know that you will treasure th era^ &i^n ^one of the original Sketches of the Glacier ana^w© little studies, including one in color, which I feel quite sure were done by Agassiz himself. Mr. George Agassiz was here last week and examined these little Sketches with me and feels quite sure that the writing in German is the handwriting of his grandfather when a young man.
The photographic negatives have been very carefully taken with a color screen and should be enlarged to about the size of the original Burkhaödt sketch which is being sent to you. I think that these enlargements, with the Originals, will make a nice little exhibit, illustrating the early history of glaciology and the Anlagen that went before the building up of the glacial theory.