Letter from Increase Allen Lapham to W. W. Curtis with Chart of Annual Rain Fall

Rocky Run, Columbia Co. W. W. Curtis

Milwaukee April 1865

Dr Sir
I wish to make a map like
the inclosed representing the amount of
rain (& melted snow) in different parts of
the state, & take the liberty of requesting
a copy of your the observation made at your
place. It may be in the following or
equivalent form

Amt of rain etc at
[Chart with rainfall amounts.]