Chicago, July 17, 1903
I have your letter of 12th, and thank you very much for the table of average results of your glides. Please advise me for what particular surface they are calculated?
I have also that of 14th, and thank you for corrections. I will write to the Revue des Sciences to change the depth of curvature to 1/25 of breadth.
Kindly advise me as soon as possible:
How is the vertical tail operated? I fear that it will not do to strike out the clause altogether, and you did not desire that the warping of the wings should be mentioned at all.
I will later on write to you concerning the computation of glides.
Have you seen that Prof. Langley is about to test his mancarrying machine?