p. 3

1112

-1272-
1867.

Milwaukee Wisconsin,

February 19, 1867.

Gen'l A.A. Humphreys,

Chief Eng. Washington D.C.

Dear Sir,--

Being much interested in all matters relating to the climate &c. of our Lake Region, I have tried through our members of Congress and otherwise to obtain copies of the Reports of the Survey of the N. and N.W. Lakes, but have failed so far to obtain those of 1862, 1864 1865 and 1866 and therefore take the libery of applying to you for the same. Having voluntarily contributed (at the request of Capt. Meade) some valuable information to the survey, perhaps I am entitled to these reports!

I avail myself of the occasion to forward [forward] a sample of Dr. Lewis' self registering barometer and thermometer (with a letter from him) and suggest that if these very ingenious and reliable instruments could be added to those of the survey at one or more stations, they would soon afford the means of reducing the ordinary tri-daily observations to equivalent hourly ones, this adding very largely to their value.

The Toronto observations will hardly be available at this distance.

I once had the pleasure of being introduced to you by Prof. Joseph Henry.

Very truly yours,

I.A. Lapham.