222 Scientific Intelligence. 
d 
b 
veinstones with apatite, pyroxene, phlogopite and graphite of the 
Laurentian rocks. 
may be permitted to say a few words in reply to Dr. Hunt’s 
assertion, than I had fallen into errors and had been led to wholly 
untenable conclusions. 
When I had the good fortune to obtain a few years ago the 
Jirst real pseudomorph after corundum—the spinel from India, 
alterations, showing from the same locality crystals of corundum 
ith from 
at any other conclusions, but that these extraordinary occurrences 
ch I have described were the result of epigenic pseudomor- 
s 
notions; but when he boldly charges me with having committed 
errors, I want better proofs than a repetition of his views, with 
which we were familiar long ago. He certainly has not a single 
fact which could show the fallacy of my conclusions, or he would 
have produced it. 
e corundum alterations have nothing in common with the 
Fontainebleau crystals, or with stanniferous orthoclase, or the green 
are contained page 
1872, and v, page 312, 1873. _I state that the regional metamorphism in which 
that other hydrous magnesian rocks may come under the same category; and I 
still so believe with regard to most beds of serpentine. But this is no ground for 
views on pseudomorphism and defiant of facts, he shows, by his 
is Fortunately: rn cpinions on others, a dogree of desperation in argument that 
fortunately, very uncommon. way of carrying int is strongly in con- 
trast with Dr. Genth’s faithful work—y. p. ». — 
