642 



GEOLOGICAL SURVEY OF THE TEERITORIES. 



From mean tide at New Orleans to Chicago, hy N. 0. J. ^ Gt. N. B. B., Miss. C. B. B., M. ^ 

 T. B. B., M. 4- L. B. B., N. 4-N. W.B B., H. W. slojie of Mississippi Biver fourteen miles, 

 M. 4- 0. B. B., and III. C. B. B. 



ELEVATION OF MEMPHIS, TEISTN". 



Feet. 



Various datum-planes. 



Canton, Miss., by N. 0. J. & Gt. N. E. K 



Grenada, Miss., by Miss. C. E. K • 



Memphis, L. W. in Mississippi Eiver 



Memphis, (supposed to be depot,) by M. & T. E. E 



Memphis, depot ■ 



Memphis, L. W 



Memphis City datum + 100 feet = H. W. previous to 

 1858, by city -engineer report. 



Grand Junction, Tenn., by M. C. E. E 



Grand Junction 



Memphis, by M. & C.E.E 



Memphis, depot M. & C. E. E 



Memphis, H. W. of railroad rejiorts, 1844 



Memphis City datum + 100 feet = H. W. previous to 

 1858. 



(This city datum + 100 feet = H. "W. is either the 

 H. W. of 1844 or of 1850 ; but they differed only 0.4 

 foot. The elevatiouof this H. W. mark in several 

 reports of the M. & C. E. E. is given as 220.44 

 above tide in Mobile Bay. As the only records that 

 I have of the M. & C. E. E. are above L. T., Mobile 

 Bay, this 220.44 may be above L. T. In this case 

 Memphis H. W. would be 218.74 above Mobile Bay 

 M. T., but in either case the results from Ifew Or- 

 leans and Mobile differ very little,) 



Final results. 



Memphis H. TV", previous to 1858, 100 feet above city- 

 datum. 



Do 



Do 



240. 00 



56.00 



0.00 



75.00 



Above M. T. ISTew Orleans. 



Below Canton 



Above Grenada 



...do 



334. 44 

 574. 44 

 329. 47 



Below M. & T. E. E. depot. 



Above Canton 



Above New Orleans, M. T 

 Below Grand Junction. . . 



25.00 

 27.00 



Below M. & C. depot . 

 Below M. & C. depot . 



Above New Orleans M. T 



.do 

 .do 



Mean of the above adopted result. 



Memphis H. W. 100 feet above city-datum.. 



Memphis H. "W. 100 feet above city-datum. . 



Do 



220. 44 

 218. 74 



Above New Orleans, M. T 



Above Mobile Bay 



Above Mobile Bay, M. T . 



MEMPHIS TO CHICAGO. 



Various datum-planes. 



.as: 



Memphis, Tenn., City datum + 100 feet = H. "W. pre- 

 vious to 1858, by N*. O. J. & G. N., M. C, M. & T. 

 E. Es. 



McKenzie Junction, by M. &. L. E. E 



L. "W". Mississippi Eiver, Sept. 30, 1858, at Hickman, Ky, 



H. "W., 1858, at Columbus, by Humphreys and Abbot's 

 report. 



(This makes the H. W. slope of the river, from Hick- 

 man to Memjjhis, 0.49 feet per mile, supposing the 

 distance to be 190 miles.) 



H. "W. 1858, at Columbus, Ky., 14 miles up the Missis- 

 sippi by slope qf river. 



H. W. at Cairo, by preliminary survey for M. & O. 



Chicago directrix, by chief engineer I. C. E. E., Octo- 

 ber, 1873. 



218. 65 

 269. 56 



213. 00 

 37.80 



7.00 

 11.50 



258. 50 



Above M. T. New Orleans. 



Above city-datum of 

 Memphis + 100 feet = 

 H.W. 



Below McKenzie 



Above L. W. 1858 



Above H. W. Hickman . . . 

 Above H. "W. at Columbus. 

 Above H. "W. at Cairo 



