WISCONSIN GEOLOGICAL SURVEY. 



EEPOET OF PKOGBESS AND RESULTS, 



FOR THE YEAR 1873. 



BY I. A. LAPHAM. 



As required by the act " to provide for a complete geological sur- 

 vey of Wisconsin," approved March 19, 1873, I now have the honor 

 to report the progress made, and the results attained during the first 

 year of the survey, and also to lay before you the maps, profiles and 

 drawings necessary to exemplify the same. The law reads as follows : 



AN ACT to provide for a complete Geological Survey of Wisconsin. 

 The people of the State of Wisconsin, represented in Senate and Assembly do enact as 

 follows. 



SECTION 1. The governor is hereby required to appoint, by and with the advice and 

 consent of the senate, a chief geologist, who shall be a person of known integrity, thor- 

 ough practical and scientific knowledge of the sciences of geology and mineralogy, and, 

 upon recommendation of said chief geologist, the governor shall appoint one or more 

 assistants, not exceeding in number four, one of whom shall be a skillful analytical chemist 

 and assayer; the said chief geologist and his assistants to constitute a geological corps, 

 whose duty it shall be to make a thorough and complete geological, mineralogies! and 

 agricultural survey of the state, and topographical surveys of such portions as may be 

 deemed by the corps to need them for the thorough completion of the work: Provided, 

 That if the appointment of chief geologist be made during the recess of the senate, 

 such appointment may be confirmed at the next session thereof. 



SECTION 2. The survey shall have for its objects: 



1st. An examination of the geological structure of the state, including the dip, num- 

 ber, nmgnitude, order and relative position of the various strata; their richness in mine- 

 rals, metallic ores, clays, mineral waters, fertilizers, building stones and other useful 

 materials, the value of such materials for economic purposes, and their accessibility for 

 mining and manufacture. 



