ALTITUDES IN CLEVELAND. 339 



lake, a distance of six miles, with a descent of about 250 feet. Of neces- 

 sity the scale of height in this figure, as in those preceding, is greatly 

 exaggerated, in order to give sufficient distinctness to the several thin 

 drift and delta deposits. 



Altitudes in Cleveland erom the City Surveys. 



For my aid in the observations and studies here presented, Mr C. G. 

 Force, chief assistant city engineer of Cleveland, has supplied the follow- 

 ing altitudes, determined by leveling. They are given in feet and are 

 referred to mean tide sea level, according to m}^ work as published in 

 Bulletin 72, United States Geological Survey, 1891, pages 15, 147 : 



Zero reference of Cleveland city levels (high water of lake Erie in 1838), 575.20. 



Lake Erie (maximum depth, 210 feet), lowest stage at Cleveland (in 1819), approxi- 

 mately, 570; highest stage (in 1838), 575; mean annual low and high stages, 

 571-574; mean surface, January 1, 1860, to December 31, 1875, 572.86. 



Intersection of Detroit and kSeward streets, near St. John's hospital, 669; of Detroit 

 and Taylor streets, 677 ; of Detroit and Pearl streets, 669. 



' Till, enclosing layers of modified, drift 



L.Eric N.W. 



Figure 4. — Section from Neivburg northivest through the central Part of Cleveland. 



I, 2, 3, 4. Successively, the Leipsic, Belniore, and Upper and Lower Crittenden beaches. K. 

 Run. Kingsbury run. 



Intersection of Superior and Ontario streets, center of the Public square, 656. 



Euclid avenue at the southeast corner of the Public square, 665. 



Intersection of Euclid avenue and Erie street, 661 ; of Euclid and Willson avenues, 

 665 ; of Euclid and Madison avenues, 673 ; of Euclid avenue and Doan street, 

 684. 



Euclid avenue at Coltman and Carabella streets (at entrance to Lakeview ceme- 

 tery), 691. 



West Madison avenue at Ridge avenue, 690. 



Courtland street at Duke street, 687. 



Lorain street at Rockport depot (South street), 781 ; at Highland avenue, 772 ; at 

 the west end of Denison avenue, 7;)9 ; at Ridge avenue, 699 ; at Harbor street, 

 688 ; at Pearl street, 684. 



Clark avenue at Ridge avenue, 698 ; at Burtoii street, 681 ; at Pearl street, 683 ; at 

 Jennings avenue, 684. 



Denison avenue at Lorain street, 739 ; at Minton street, 739 ; at Ridge avenue and 

 the bridge over the Chicago, Cincinnati, Cleveland and Saint Louis railway, 

 744 ; at Ritchie street, 738 ; at Wyoming street, 728 ; at Pearl street, 690. 



Harvard street at Reade street, 745 ; at Bissell street, 759. 



Union street at Wageman street, 742. 



