To the Honorable the Boai^d of Geological Survey of the 

 State of Michigan. 



Gentlemen : 



I have much pleasure in submitting to your honorable body 

 my final Report, giving the results of the Geological Survey of 

 the Lower Peninsula of Michigan, commenced in the spring of 

 1873, and prosecuted without interruption during the past four 

 years. 



For several reasons, but especially as so many of the results 

 of this survey had to be attained through the combination of 

 fragmentary observations, made at different times and in far 

 separated localities, it was found impossible to call any one to 

 my assistance without danger of incurring endless complica- 

 tions, and of arriving, in many instances, at most unsatisfactory 

 conclusions. 



Therefore, with exception of the special report on the salt 

 production of the State (Appendix B), I may claim the work as 

 all my own. That report has been elaborated by my friend, 

 Dr. S. S. Garrigues, the State Salt Inspector, a gentleman who, 

 from his long official connection with that industry, must be 

 better qualified than any other to treat of it in a work of this 

 character. Very respectfully yours, 



C. ROMINGER, 



State Geologist. 



Ann Arbor, July ist, 1876. 



