Meeting of the A)i>erican AN.sociafioii. — f'/j/Ktiii. 238 
fact that the work was performed in the summer of 1895, when the vol- 
ume was exceptionally small. The remainder of the profile was interpo- 
lated by the aid of comparative studies of the character of the water 
surface. A depth of about 100 feet is ascribed to the stretches above 
and below the Whirlpool, each being separated from the Whirlpool ba- 
sin by a narrow sill: the depth of the Whirlpool is estimated at 150 feet; 
and a gradual deepening is inferred for all the channel l)elow Winter- 
green fiat. 
In interpreting the ijrotile, features at the Whirlpool are explained by 
the phenomena of the buried channel, and the depth at the mouth of 
the gorge by a temporary low baselevel of post-Iroquois date. The 
shoals at Wintergreen flat and the Whirlpool rai>id are correlated with 
epochs when the discharge of the upper lakes by the Trent and Mattawa 
valleys left the Niagara river and falls too small and weak for deep 
excavation. 
3L The Niagara Falls Gorge. George W. Holley. No abstract 
nor notes of this paper have been received: but reference may be luade 
to this author's interesting little book on Niagara, puVjlished twenty- 
four years ago.* 
32. Origin and Age of the Laurentian lakes and of Niagara Falls. 
Warren Upham. (Read by Prof, C. H. Hitchcock.) Published in the 
last preceding number of the American Geologist (vol. xviii, pp. 169- 
177, with map, Sept., 1898). 
33. Correlation, of Warren Beaches with Moraines and Outlets in 
Soutlieastern Michigan. F. B. Taylor. The work reported was begun 
early in June of this year by Mr. G. K. Gilbert, and was afterward con- 
tinued Vjy the writer at his request. It was found that the Forest beach, 
which is the lowest well-marked beach of lake Warren, rises from 83 
feet above the level of lakes Huron and Michigan near Port Huron, 
where Prof. Spencer measured it, to 195 feet at Bad Axe, where it rounds 
the end of the " thumb" of Michigan (the projection southeast of Sagi- 
naw bay). From Bad Axe it passes through Gagetown to Vassar, and 
then Ijackward to Cass City ; thence it runs southwesterly past Juniata 
and Clio, and thence nearly west to Maple Rapids, about five miles 
within the head of the Pewamo channel. At Chapin its altitude is 
about 125 feet. Beyond that place westward the aneroid determinations 
were not very satisfactory. .Vt Maple Rapids the Forest beach has an 
approximate hight of 100 feet. 
Detailed study of the glacial topography in the region about Bad 
Axe, Verona Mills, and Ubly, shows that up to about 200 feet the land 
has a gentle and comparatively smooth slope toward lake Huron. 
Above is a rugged morainic topography, with the hilltops 250 to 275 feet 
above the lake. Near Port Huron the Arkona beach, as identified by 
Spencer, is 116 feet above the lake. But the closest examination of the 
hills near Verona Mills and Ubly failed to show any trace of shore lines 
above the Forest beach . 
♦Niagara: its History and Geology, lucidcnts and Poetry, witli Illu.strations. 1872. 
tl63 pages and a map.) 
