242 Canadian Record of Science. 
appear, with a proper introduction, as a Systematic Miner- 
alogy, to be followed by a Descriptive Mineralogy. The 
general principles here set forth are discussed at length in 
the author’s ‘Mineral Physiology and Physiography”’ 
(Boston, 1886), pp. 279-401, where, in a chapter entitled 
“A Natural System in Mineralogy,” will be found an exam- 
ination of the constitution and relations of the known natu- 
ral silicates arranged in tribes, and tabulated, with the cal- 
culated values of v, and a new quantivalent chemical nota. 
tion. See farther, a paper on “The Classification and 
Nomenclature of Metalline Minerals,”* discussing Class I, 
in the « ‘Proceedings of the American Philosophical Society ” 
for May 4, 1886, and in the Chemical News, August 10 and 
27; also the author’s ‘“‘ New Basis for Chemistry,” 2nd edi- 
tion (Boston, 1888), where, in chapters vii. and xiv., many 
points in the proposed mineralogical classification are elu- 
cidated. 
MINERALOGICAL EVOLUTION. 
By T. Srerry Hunt, LL.D., F.RS. 
(Abstract.*) 
In a paper read by the author in 1887, before the Geo- 
logical Section of the British Association for the advance- 
ment of Science, on The Elements of Primary Geology, it 
was said that the “transformation of the primitive izueous 
material of the earth’s crust through the action of air and 
water, aided by internal heat, presents a mineralogical 
evolution not less regular, constant, and definite in its 
results than the evolution apparent in the organic king- 
doms.” The details of this complex evolutionary process, 
‘An abstract of this paper, printed in the programme of the 
Royal Society of Canada, without revision or correction by the 
author, will be found in the Chemical News for June 29, 1888. 
” Read before the British Association for the Advancement of 
Science, Bath, 1888. 
* Transactions, p. 704; also Geological Magazine, November, 1887. 
