Geology and Natural History. 299 
ue taught that “metamorphism is pseudomorphism on a broad 
cale”” I would here correct the statement by dropping the ex- 
ception, so as to make it read simply— 
“T have never held that metamorphism is si SEL Phas on 
a broad scale.” 
hen the sentence on page 109 was written I had the strongest 
a onal conviction that I had never entertained this view as a 
r 
an refer now to pated evidence that the broad principle 
nd this evidence is ones by the book- 
ent. er 
= expressing my confidence in Bischo s views a nnne the 
ten, a of alkaline silicates bs Bi saperee aero and metamor- 
lates js statement on the subject. Only the case of a aces 
- “Then mee of thes « decumice ‘fon ne is not to be 
same proce 
of the so-called Rensse rite [a variety of the magnesian mineral, talc] in 
Northern am York are other pelt of the widely extended influence of the 
Pseudomorp’ e 
t The “extensive tal talcose formations” are now excepted, as they have been 
Proved not to be magnesian or taleose. ; 
