274 
agency is known to me, although hinted at by [some] American ge 
ologists. 
13. It isa remarkable fact that brine-springs exist in considerable 
quantity in the middle stage of the Silurian system, a group or two below 
the Onondaga salt-springs of the upper stage, and three palzozoic sy* 
tems below any salt deposits in Europe. 
14. That the form and direction of the five great Canadian lakes are 
not due originally and mainly to the passage of loaded waters over thet 
site, but that they follow the outcrops of their containing sedimentary 
rocks ; 
; changes in shape and size having, nevertheless, occurred since. 
Th e 
westward, in slopes and plateaux, by the Silurian and Devonian 
strata, the lowest or most ancient being on the east. This 1s beautifully 
wav run 
. . . a n. 
conformable with what took place in the carboniferous, permian, 
mals are always found in limestone more or less pure, and 
in sandstone more or less ure,—with exceptions, such as usually 
with respect to locomotive animals, The calcareocolous are every"™. 
the most numerous. It is true that molluscs are the principal favo 
the deposition of calcareous sea bottoms; but these latter gr 
' ards the multiplication of individuals. ee alle 
18. That the iron-ore which we so frequently see investing mY 
remains, had access to them after their death and sepulture. How York 
19. Every group, as established by the State Geologists of animated 
is a distinct centre of life—a separate realm or community of 
beings, which may be called epochal, so marked are the re the 
@ majority of these existences always perished at it with its 
a . ceas 1 iat 
new and peculiar flora (and for other reasons,) was only able t 
uses. 
