54 Illinois State Lahoratory of Natural History. 



COOK COUNTY. 



Bench-marks. 



Mean water Lake Michigan. U. S. L. S 581.28 



U. S. P. B. M. 89. 



Bartlett. 150 M. northwest of depot 

 C, xM. & St. P. R. R., on east face south- 

 east corner of stone foundation of Con- 

 gregational church 802.2 



U. S. P. B. M. 93. 



Manheim. 250 M. northwest of depot 

 of C, M. & St. P. R. R., in south side of 

 brick chimney, C. H. Bossenbarg's Cream- 

 ery, 3 feet above ground 649.39 



U. S. P. B. M. 94. 



Cragin. N. E. cor. Grand and Armitage 

 avenues, 150 M. north of line of C, M. & 

 St. P. R. R., in east face of Jennings's 



biick saloon, 4 feet above ground 616.52 



U. S. P. B. M. 95. 



Chicago. Corner Dixon St. and Bloom- 

 ingdale road, 20 M. southwest of crossing 

 of C, M. & St. P. and C. & N. W. R. R., 

 in west face of L. Epps's brick malt house, 

 6 in. from northwest corner, 2]/^ ft. above 



ground 590.27 



U. S. P. B. M. 99. 



Chicago. I. C. R. R. stone freight depot, 

 foot of Lake St., east face of foundation, 

 1 foot south of northeast corner, 2% feet 

 above ground 590 



Geodetic Stations. 



Sec. 3, T. 37 N., R. 1 2 E. In the N. W. ^^ 

 of the section 728.58 



Sec. 13, T. 38 N., R. 12 E. The center 

 of this section lies 37 M. N. 80° 44' W... 618.88 



Sec. 27, T. 38 N., R. 13 E. The N. E. 

 corner of this section lies 580.6 M. N. 

 38° 41° E 616.28 



Sec. 19, T. 37 N., R. 14 E. The N. W. 

 corner of this section lies 637.8 M. N. 

 84° 46' W' 664.98 



Sec. 28, T. 36 N., R. 12 E. The S. E. 

 corner of this section lies 285.88 M. S. 

 89° 57' E 767.68 



