Dear Doctor Sabin:
I am sending you under separate cover a sample of palmitic acid. I don't know the origin of this acid but it was purchased from Eastman Kodak Co. Judging by the melting point it is fairly pure.
I have found another liquid saturated fatty acid from another fraction of the T.B. wax. The substance differs slightly in properties from the other samples that you have received--the optical rotation of this new acid is decidedly higher. I should like very much to provide you a small sample for experimental purposes if [you] can use it. The time before vacations begin is growing short but I should like very much to learn something about the biological behavior of this acid in comparison with the others.
I have to go to Philadelphia on Tuesday night to be on hand for harvesting nearly 2000 cultures of avian [tuberculosis] bacilli on Wednesday. On my way back from Philadelphia I will stop in to see you in New York and will bring a sample of the acid with me.
Very sincerely,
Rudolph J. Anderson