176 Scientific Intelligence. 
connected with ee and oe Geology, and more fully — 
Historical Geology. It is a popular work on the subject for the 
log 
general reader and will be found a useful book for the young stu- — 
de 
ie volume is neatly print 
4. An Outline of General Geology, with copious ae a 
xeology, Paleontology and Economic Geology in Cornell Univer- 
sit oO haca, N. ted for the author at the 
University Press. 1878.—This work is based by the author on 
the Syllabus of his lectures to the students of Cornell University. 
It is a brief synopsis of the various branches of general geology, 
presenting in a condensed way the principles and conclusions with 
many prominent facts. It is well fitted for use in connection with 
a course of lectures; and the geological student will also find it 
valuable as a means sof heb the subject. The work contams — 
a list of references to various geological pects # beg e 
treatises, periodicals, aninitions of Societies and memoirs, to ai 
the student in extending his range of stu 
chemical composition of the species as previously defined by him. 
His conclusions are based upon sixteen new analyses: made with 
consequence of which most of them are rejected by him in 
his discussions. The following are the nova ge results adopted 
by h im: (1.) Brorrres: Anomite, og cure of S 
Si,Mg,,0,, in ratios from 1:1 to 2:1; Mer ove comp 
Si, ALK. H, O,, and Si,Mg,,O,, in ee ratio ae 
composition, “Si, ALK, 10,,(5i, Fe,K,H.,0,,) nee Si,Mg,,0,, (2+) 
ee Phiogopite, Selection: Si,A1,K,O,,, also Si,,H.9,, 
(with Si,,O,F,,) and Si,Mg,.O,, often in the ratio 3: “1:43 Zinnwal- 
a (Cryophy'live), composition $i,Al.K,O,, (Si,Al,Li,O "Si Fe,,0,, 
a 
6 24 3: 24 
in the ratio 10:2: 3. \ Muscovire : Lepidolite, 
prea rin 381, Al, KO, (S8i,Al,Li,0,,) and 5Si,,0, ‘Muacwtts 
(D. ), composition Si, Al, K, H,O,, true muscovite, and also 
amourite 
this same together with Si,,H,O,,, = the ratio 3:1 (Phengite) ; 
Paragonite, composition Si “Al oN a,H,0.,. ouch garite, Si,Al,Ca, 
H,0,,.— Vienna Academy, lxxviii, June, 18 
Ill. Botany. 
On Plant- Distribution as a field for Geographical sins eho 
= W.T. TuisEeLTon-Dyer, Assistant Director of the Royal G 
dens, Kew, London. 1878, p. 36, 8vo.—This is a lecture, de- 
livered (we believe) at the Royal Institution, and published orig- 
inally in the Proceedings of the Royal Geographical Society, Lon- 
