412 . THE CANADIAN NATURALIST. [Vol. vii. 



Bench marlcs in the city of Cleveland, referring to city zero, 

 which is the line of high water of Luke Erie in June, 1838, 

 566.50 feet above mean tide water at Albany, N. York : -'^ 



1. Surface of stone work, Ea,st Pier, 400 ft. from the 



south end (now lost) 2.00 feet A. 



2. Capt. Meade's U. S, Top. Engineers, 1859, on a pile 



east of No. 1 2.02 " " 



3. N. E. corner of hase water tahle. Hotel corner of 



Main and River streets, west side. City Engineer 



Strong, 1874 3 129 " '' 



4. N. E, corner Myers' Stove Works, River street, west 



side. Asst. Engineer "Wheeler, U. S. Survey, 



1874 3.127 " " 



5. Door sill, S. west corner of Engine House, C. C. & 



C. R. Road, Front street. I. N. Pillsbury, City 



Engineer, 1854 5.829 '' " 



6. Coping of west wing wall of canal lock at the 



Cuyahoga river. R. E. Howe, State Engineer, 



1838 6 300 <' " 



7. First course of masonry, base of Light House, 3 ft. 



above ground. Water street; projection of 0.200 

 ft. over the course below. Asst. Wheeler, Lake 

 Survey, 1874 67.713 " '' 



8. N. E. corner of base of Perry Monument. C. G. 



Force, Asst. City Engineer, 1874 86.533 <' « 



0. Mitre sill of guard lock, Erie canal, Buffalo State 



Engineer, John Lothrop, 1854 11 .420 '' B. 



10. Base of water works tower, Detroit. A. E. Hathan, 



City Engiueer, 1854 3.130 " A. 



Plane of SouncUnfjs at Clevreland : 



U. States Assistant Engineer, Geo. Fell — fall of Stage of water 



1873 2.500 feet B. 



City Engineer, Chas. Strong, Feb. 1873 2.920 <• " 



Col. T. B. W. Stockton, Plarbor Agent, April, 1846 4.400 " '' 



Lowest water, monthly mean, March, 1846. Stockton's 



daily registei- 4.770 '' " 



Average low water at Cleveland, Detroit and Buffalo, 



1846 4.620 '' " 



Extreme low water — l)y monthly average — 1846 5.100 " " 



* Mr. Jos. T. (Gardner, Geographer, Washington, D.C., has in con- 

 nection with the V. S. Coast Survey revised the elevations of the 

 Lake region and the Mississippi valley, by whom niean tide at Albany 

 is 4.84 feet above mean tide at Xew York. 



