34 
FOURTEENTH REPORT. 
GEOLOGY. 
Recent Publications. One of tbe recent successful applications of 
geologic science to an economic purpose is effected in our Publication 
7. Surface Geology of the Northern Peninsula of Michigan, by Prof. 
Frank Leverett. This work includes a map of the surface or soil forma- 
tions and a brief explanatory and descriptive text discussing the char- 
acter and general soil value of the various classes of formations. The 
report is designed to convey accurate and reliable information con- 
cerning the land, its soil values and adaptability to agriculture, while 
the philosophic and purely scientific aspects of the study are subordi- 
nated. 
The reception accorded to this work is indeed gratifying and the de- 
mand has necessitated the printing of nearly 100,000 copies of the 
map, of which number 76,000 constitutes a private edition paid for by 
the Upper Peninsula Development Bureau. A similar volume and map 
dealing with the surface or soil formations of the Southern Peninsula 
is in preparation by Prof. Leverett, under co-operative agreement with 
the Director of the U. S. Geological Survey. We have authorized two 
private editions of this map in advance of its appearance, and it is 
probable that there will be required some 75,000 copies to supply the 
demands which are expected to be made. 
There has appeared recently Publication 5, by Prof. Win. H. Hobbs, 
a bulletin on the glacial and post-glacial uplift of the Michigan basin, 
and a resmnd of earthquakes in Michigan, and Publication 4, prepared 
under the direction of the Chief Field Naturalist, being a report upon 
the biology of the sand dune region on the south shore of Saginaw 
•Bay, Michigan. 
Publications in Press. The publications in press include two volumes 
by Dr. Alfred C. Lane, constituting Publications 6, on the Keweenaw 
Series of Michigan, and Publication S on the Mineral Resources of the 
state, prepared under the supervision of the Director. 
Mineral Statistics. The latter volume is the first of a series which 
will henceforth be issued annually in accordance 'with Act No. 7 of the 
Public Acts of 1011, which abolished the office of the Commissioner 
of Mineral Statistics and transferred the duties formerly devolving on 
this office to the Michigan Geological and Biological Survey. In this 
series of annual bulletins there will be published complete statistics 
of the production and value of the various mineral products of the 
state, together with a discussion of the progress and status of the 
mineral industry for the current years and new developments in geology 
having a bearing on the development of the mineral industry. The 
statistics of production are obtained directly from the producers under 
co-operative arrangement with the Division of Mineral Resources of 
the U. S. Geological Survey. Results are tabulated early in the year 
and preliminary statements issued to the press of the state and leading 
technical journals. 
Publications in Preparation. There is completed and awaiting publi- 
cation, (1) the geology of Arenac county, by Prof. W. M. Gregory; (2) 
the geology of Wayne county, by Prof. W. H. Sherzer, including chap- 
ters on the Dundee of southern Michigan, by Prof. A. W. Grabau, and 
