p.2

[Left Page]

Has the zero of the rod always been "downwards" or
intended to float at the surfact of the water?
Is the Self Register changeable or reversible so
that the pencil may run towards you on the sheet
to represent either high or low water when you
stand with the hours increasing towards the righthand?
Either the staff gauge Rod has been inverted so as
to have the zero at the top or the pencil is reversible
in its direction across the paper while representing
high or low water.

In 1866 the comparisons differed by a constant
quantity - but in 1869, 1870 & 1871 the sums of the readings
for a comparison are a constant.

The discrepancy I first wrote you about
still exists.

Excuse the many questions and haste in
writing this

Yours very truly

P. B. Wheeler

[Right Page]

Milwaukee Wis.

Water Level Monthly Mean below H. W. 1838 [High Water 1838]

Jan F. M. Apr M J J A. S O N D
1865 4.13 4.04 3.83 3.59 2.83 2.65 3.03 2.82 2.86 2.96 3.65 3.97
1866 4.22 4.46 4.41 --- 3.63 3.30 3.27 3.21 3.35 3.46 3.55 3.74
1867 3.79 3.75 3.57 3.30 3.12 2.74 2.61 2.70 2.91 3.20 3.71 ---
1868 3.66 3.41 3.19 3.24 3.52 3.76 4.16 4.17 ---
1869 4.26 3.93 3.39 3.01 2.76 2.87 3.23 3.30 ---
1870 2.12 {not 2.72}
1871 3.62