Dear Dr. Federn:
Of Virchow I would be interested in his opposition to Pasteur, and some expressions of it in action or word.
Of the next moon shooting attempt I expect that if the rocket should go sufficiently high up it will be curved from the direct path, namely because it would be electrified by passing through the charged layer around the earth and then turned sideways in the magnetic fields of the earth and of the sun. I believe the next attempt will come tomorrow.
I do not add questions since you have quite a few on your list.
Enclosed the rest of your fare expanese that I had not with me at the station. Once a month, I hope, we could arrange your visits at Princeton. Any day of the week is equally good.