LETTER OF N. H. WINCHELL, STATE GEOLOGIST. 
THE UNIVERSITY OF MINNESOTA, 
November 30, 1891. 
Hon. JOHN S. PILLSBURY, President of the Board of Regents: 
After an interval of six years I tender again a volume of the final report of the geolo- 
gical and natural history survey of the state. The materials for this volume have accumulated 
gradually since the survey began, and latterly they have been much increased through 
the codperation of various collectors and assistants. This manuscript will make a large 
volume, and it may be found desirable to issue it in two parts. It pertains to the paleon- 
tology and systematic geology of the Lower Silurian, which is found in the southeastern 
portion of the state, already described in volumes I and II. 
Very respectfully, 
Your obedient servant, 
N. H. WINCHELL, 
State Geologist. 
LETTER OF HON. JOHN S. PILLSBURY. 
MINNEAPOLIS, MINN., Dec. 5, 1891. 
Pror. N. H. WINCHELL, State Geologist: 
I have the pleasure to acknowledge the receipt of your favor of the 380th ult., 
tendering the third volume of the final report of the survey, and to congratulate you 
on the completion of another considerable portion of the state survey. I trust there 
may be no delay in its publication. 
Very truly yours, 
JOHN S. PILLSBURY, 
President of the Board of Regents of the University of Minnesota. 
