Niagara Falls 



1859 



Ramsay 



1864 



Campbell 



1865 



Marcou 



1869 

 Hyatt 



1872 



Gunning 



1873 



Holley 



is below the reality," but says he has " little to add to the account of 

 the Later Tertiaries of Niagara given by Sir Charles Lyell and Professor 

 Hall." 



1864 



Campbell, John Francis. A short American tramp in the fall of 

 1864. Edinb.: Edmondston and Douglas. 1865. Pp. 228-264. 



A delightful geological study in nontechnical terms by a wide-awake 

 tourist. His conclusions from sands and scratches on Goat Island are 

 interesting. 



1865 



MARCOU, JULES. Le Niagara quinze ans apres. (Extrait du Bulletin 

 de la Societe— Geologique de France. 2e serie XXII. P. 1 90. 6 Mars. 

 1865.) 



1869 



HYATT, Alpkeus. Rock ruins. [Niagara Falls.] (Am. nat., 

 April, 1869. '2:77-85.) 



The author uses the Falls of Niagara as a concrete example of the 

 effect of water upon rock masses. He describes the rock formation at 

 Niagara, gives an account of the various well-known " Falls of Rock," 

 and reviews the theories of Hall and Lyell as to the recession of the Falls 

 and their future. 



1872 



GUNNING, W. D. The past and future of Niagara. (Pop. sci. mo., 

 Sept., 1872. 1:564-573.) 



Written after the survey of 1842 and discusses the evidences of and 

 reasons for recession together with the significance of the geology and 

 topography of the region. 



1873 



HOLLEY, GEORGE W. The proximate future of Niagara in review 

 of Professor Tyndall's lecture thereon. (Proc. A. A. A. S. (Aug., 

 1873.) 1874. 22:pt. 2 147-155.) 



A review of Tyndall's opinions and statements, from many of which 

 the author differs, and on pages 1 5 1-1 52 a description of the " Formation 

 — the topography of the river bottom " as revealed to observers in March, 

 1 848, when the ice dammed the river so effectually. Professor Tyndall's 

 prediction that the American channel will be eventually dry and used for 



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