GEOLOGICAL AND NATURAL HISTORY SURVEY, 



83 



Eacinc Point 16.00 



Raci 



6.00 



Oak Creek . ■ ." 2.00 



One mile further north 1.60 



Milwaukee ■ • 6.25 



Port Washington ......■■ 2.30 



One mile further north. 1.50 



Place further north . ' 3.00 



Place four miles south of Sheboygan 8.00 



Sheboygan 6.25 



Manitowoc . 5.00 



From the above table it appears that the average erosion in 

 the portion of the shore between Milwaukee and Manitowoc is 

 4.33 feet per year, while between Milwaukee and Evanston it is 

 6.24 feet per year. . The average erosion of the two sections is 5.28 

 feet. 



A series of more careful measurements than those given in 

 the above table appears in the Geology of Wisconsin and covers 

 part of this section of the shore. The following is the statement 

 furnished by Dr. Lapham to Prof. Chamberlin (i): 



"Mr. S. G. Knight, of Racine, has carefully measured for the 

 Geological Survey, from the nearest section corner or quarter 

 post, to the bank of Lake Michigan, along all the section lines in 

 Racine County, the results of which, compared with the Govern- 

 ment Survey made in 1836, are given in the following table. Had 

 these measurements been made at right angles to the shore line 

 the result would have been a trifle less; but as some portions of the 

 bank have been artificially protected we may assume the result 

 as a close approximation to the actual amount of loss, during the 

 past thirty-eight years in Racine County. These measurements 

 will have their value many years hence." 



LAKE SHOKE IN KACINE COUNTY. 



Section Lines. 1836. 



Chains. 



North line, Sec. 6, T. 4, R. 23 32.70 



North line, Sec. 7, T. 4, R. 23. . ...... . 3468 



West line, Sec. 8, T. 4 R- 23 30.18 



North line. Sec. 17, T. 4, R. 23 • • 16.38 



West line. Sec. 16, T. 4, R. 23 . . . 10.86 



(1) Geology of Wisconsin, Vol. II, 1877. pp.. 231-232. 



