274 THE CUTTING AT CROTON POINT. 
before the application of these forces, they will remain 
parallel after it. The same is true of a broken line or of 
a curve. 
Reasoning backward, we may say that the parallelism 
now existing, proves parallelism before the play of the 
forces which caused the folds. But if it be said, that 
this would require those pushing forces—so called for 
lack of a better name—to be approximately equal, or at 
least that they did not differ greatly among themselves, 
it may be granted, and indeed is what might be expected 
if the thrust came from the diminishing temperature of 
the ocean bottom, since that is approximately uniform 
in width. 
Taking into consideration that according to geologists 
(See Dana Man. Geol.) the trend of the coasts have un- 
dergone no essential change since the earliest date of 
which they have any Knowledge, and the effect of forces 
perpendicular to the coast trend, it is difficult to see how 
we escape the ‘‘need of this flotation theory,” at least 
till something better is devised than has yet been offered. 
APRIL 20. 1887—FIFTY-SIXTH REGULAR MERTING. 
William G. Stevenson, M.D., chairman, presiding. 
Messrs. H. Zingg, W. J. Bolton and Charles C. Mills 
were elected members. 
The proposed amendments to the by-laws were 
adopted. 
The following paper was read : 
THE CUTTING AT CROTON POINT, N. Y. 
BY CHARLES B. WARRING, Ph.D. 
Just below Croton Landing, thirty-three miles from 
New York, is a remarkable point or spit of land nearly 
two miles in length, and separating Haverstraw bay 
158 
