T. S. Hunt on the Criticisms of Prof. Dana. 45 
rocks are formed from the metamorphic rocks, and represent 
the maximum of intensity, or extreme limit of metamor- 
ism.” 
Journal for March, 1860 [II, xxix, 284] and more fully in the 
nadian Naturalist for Jane, 1860 [also in this Journal, xxxii, 
56], where it was pointed out that steatite, chlorite and serpen- 
tine were probably derived from sediments similar to the mag- 
a Silicates found among the tertiary beds in the vicinity of 
aris, the so-called magnesian clays. 
Ye have seen that these various novel views, put forth by 
me in 1859 and 1860, though totally different from those taught 
: followin e origin of ontine. He 
g nearly Delesse” as to the origin of serpen : 
also asserts that I “make Delesse the author of the theory of 
