THE 
AMERICAN 
JOURNAL OF SCIENCE, &c. — 
— 
_ Arr. 1.— Remarks on the supposed tides, and periodical rise and ~ 
: Jall of the North American Lakes; by Major Henry Wuirtine, 
U.S. Army. 
coe 
In the article “on the supposed tides in the great North Ameri- 
~ can Lakes,” communicated by Gen. H. A. S. Dearborn, (Vol. xv1. 
78 No. 1. April 1829,) it is stated that Gov. Cass had been requested 
___ 0 cause observations to be made, during his stay at Green Bay, on 
the changes of elevation in the waters at that place. In the year 
1828, while there on public duties, he did so, during a course of 
‘ More than six weeks. The following table is the result, presenting 
¢ 2 Seties of observations of such extent and minuteness, as to deter- 
Mie as satisfactorily, perhaps, as the case admits, the character of 
the phenomenon in question. A cask, without heads, was fixed in 
. ~ the Pox river, just within its mouth, with a rod, graduated with inch- 
ib &s, placed perpendicularly in the center. ‘The cask was perforated. 
+ 80 as to admit the water freely, while thé rod, at the same time, was 
3 a from such fluctuations of the surface as the wind might 
‘ Table of observations on the rise and fall of the Lake at Green Bay, 
made by Gov. Cass in 1828. 
Course of the | Strength of the | Height of the 
| wind. wind. water. 
x N. Moderate. 
bb 66 73 8. 
rT 6 54 
‘ec “ce 1 1 
Ww. Light. 10 
6c rT 104 
ce 66 6 
7} és 6 
3 > } i ‘i 64 
Soe 2 
Vou. XX.—No. 2. 27 
