MICHIGAN ACADEMY OF SCIENCE. 
37 
PROGRESS OF TOPOGRAPHIC WORK IN MICHIGAN. 
Co-operation in topographic mapping with the United States Geological 
Survey was commenced by the State of Michigan in 1901, when an allot- 
ment for such work was made by the Director of the State Geological 
Survey. Since then the amount of co-operation has been as follows: 
1903 
$800 
1905 
2,000 
1906 
3,000 
1907 
3,000 
1908 
1,000 
1909 
2,000 
1910 
2,000 
1911 
2,000 
The thirty-second annual report of ilie Director of the United States 
Geological Survey shows that 5,117 square miles have been topographic- 
ally mapped in the State of Michigan up to June 30, 1911, this being 
about nine per cent of the entire area of the State. Of this area re- 
ported as mapped, 3,530 square miles are located in the southeastern 
part of the State. The resultant maps of this area, published on the 
scale of 1 :62,500, were made under the topographic standards now in 
force in the Geological Survey and are in such detail as to satisfy the 
engineering and economic, as well as geologic, needs of this portion 
of the country. 
Much of the area mapped in the northern peninsula is classified as 
reconnaissance on the maps of that country, with the exception of the 
Marquette, Calumet Special, and Menominee Special sheets. 
Practically all of the quadrangles in the southern peninsula were sur- 
veyed through a co-operative arrangement between the Federal Survey 
and the State Geological Survey of Michigan, but the amount of such 
co-operation has been comparatively small on each side and only suffi- 
cient to complete about one quadrangle a year. 
The wisdom of establishing cooperation with the United States Geo- 
logical Survey for topographic mapping within the State has been 
fully demonstrated by the results obtained during the nine years in 
which it has been carried on. The popular interest shown in the progress 
of the work and in the data showing the completion of topographic 
surveys in certain sections is ample proof of the need of work of this 
class. 
It is important that a much larger appropriation be made for co-opera- 
live work with the United States Geological Survey than has been 
available during the past few years. Topographic maps in the Upper 
Peninsula are most urgently needed for the study of the development 
of that entire portion of our commonwealth, and experience has shown 
that the cost of surveys in territory similar to this is relatively small 
