322 Geographical Notes. 
In Lake Michigan the shore-line topography and hydrography 
have been carried on the east shore from Little Point Sable to New 
Buffalo, a distance of one hundred and forty miles, and on the 
west shore from Manitowoc to Oak Creek, south of Milwaukee, a 
distance of eighty-five miles, leaving but one hundred and twenty 
miles of shore-line to finish the lake. The off-shore hydrography 
has nearly kept up with the shore-line wor 
reconnaissance has been made, and stations erected for a tri 
angulation, to connect Green Bay with Milwaukee, over a distance 
one hundred and twenty miles, and a part of the angles meas- 
red. 
(the northern boun  Yenk) to the east end 5) 7 
Ontario, = @ part of the angles have been measured 
graphy and hydrography h een pide wien the forty 
e ow 
tance of thirty miles from the south end of the lake. : 
In the office, besides the ordinary eae Coherent and plotting of 
the field-work, final chart No. 2 of Lake Superior, and a bse 
Isle Sovale,. have been prepared for the engraver, "and pre oat 
chart No. 3 of Lake Superior has been engraved on sone 
publiitivd: "Final charts Nos. 1 and of Lake Superior, and 
chart of St. Clair are now in progre base 
The expansions of the 15-foot ‘teat bar, and of the two 
tubes, have been determined ; observa tions for difference of xe 
tude have been made with Dul uth, Minnesota; Wie ee 1, De 
Austin and Battle Mountain, Nevada; and Fort Leavenworth, 
Kansas. The Washington work has raid reduced. a 
The meteorological work of the survey has been continue 
The preliminary report of Prof. S. L Smith of New a 
on the zodlogical results of the dredging which was cart! Cont 
in August and September, 1871, is appended to Major 
stock’s report. rvey 
The longitude of Detroit (site of the present Lake Su a4 
observatory) has been determined as west of Weal 
008.12 + 08.02. The longitude between Detroit an pee 
and etree Duluth and St. Paul, has also been determm 
telegraphic connection, but the result is not publis ished. 
q 
is given showing the progress of the survey, indicating ey ait : 
the shores are triangulated, how far carefully survey 
how far the maps are ready for publication. Jor: 
mn) "Wheeler's Survey in Nevada and Arizona. —The exP 
