44 Illinois JState Laboratory of JSatural History. 



Sec.l6,T.15N.,R. 7 E...W. W. Daulev 869 



" 32, " R. 9 E. '' ' 691 



" 10,T.14N.,R. 8E. " 910 



CALHOUN COUNTY. 



Bench-marks. 



Calhoun Point at mouth of Illinois 

 River, 60 M. from edge of woods on Illi- 

 nois River and 150 M. from edge of woods 

 on Mississippi River. Top of stone set in 

 ground 420.41 



U. S. P. B. M. 29. 



Bolt in stone set in ground, 5 M. east 

 of Sny levee, opposite Clark ville, Mo., 

 and about 50 M. east of ferry landing.... 447.63 

 U. S. P. B. M. 30. 



Stone post east of Sny levee, and three 

 and one half miles below'U. S. P. B. M. 29. 447.58 

 U. S. P. B. M. 31. 



Stone post at base of levee 175 M. 

 northwest of house occupied by Mr. Cain, 



and owned by Rock & Baker 424.77 



U. S. P. B. M. 32. 



Top surface of rock on hillside, 50 M. 

 east of shore of Hamburg Bay, side of . 



wagon road 466 71 



U. S. P. B. M. 33. 



Top surface of natural rock, east side 

 of wagon road, and four miles north of 



Hamburg Bay 513.84 



U. S. P. B. M. 34. 



North face of natural rock forming 

 south side of first exjjosure south of Ham- 

 burg, 120 M. east of sharp bend in road, 

 one foot below top surface of rock, and 



four and one half feet above creek 444. 



U. S. P. B. M. 35. 



38 M. east of bank, and 250 M. below 



island No. 482 437.73 



U. S. P. B. M. 36. 



Stone 8 M. from river bank, 1190 M. 

 above warehouse at Red's Land i no- 436.91 



