Botany and Zoology. 479 
BaQs ot riggs tice Fes,O, KO 
[40 19] 5°03 4:08 0-70 = 100 
These Spc pk Sie nine mene with the formula (AJ,O,,Fe,O,) 
l 
Solution it yields a fine blue. It is not attacked by acids except 
when first ignited at a red heat, when heated sulphuric acid dis- 
solves it. The locality from which this interesting mineral was 
obtained by the engineer whose name it bears is the Soktoui, 
southeast of Adun- Tschilon in western Siberia.— Bull. Soc. Mi in, 
vi, 20, 1883. 
16. Pier cro-epidote, a new magnesian epidote.—MM. Damour 
and DusCioizwavx have described a new member of the soulae 
group in which magnesia enters in the place of lime. e crys- 
tals which have been examined by M. DesCloizeaux, though too 
imperfect to allow of exact determination, correspond with ordi- 
nary epidote in angle and in optical pro erties. The crystals are 
small, transparent to translucent, and of a white or slightly yel- 
lowish tint. They seratch aria and are infusible in the blowpipe 
ame. M. Damour has shown as the result of some qualitative 
tests that the mineral is a silicate of alumina and magnesia with 
associated with lapis lal calcite, dolomite, diopside and pyrite. 
The “geo is Lake Bai 
ext-Book of eats with an extended sheep 
a ee ind oie and Physical Mineralogy ; 
Sart y¥ Dana. Revised edition. 521 pp. 8vo. New ak 
1883, i: Wiley & Son. pee new oe of the Text-Book of 
tl 
study ‘of their optical properties, lustrated by numerous wood- 
points ; further, brief descriptions of new ae aang % state- 
ment of i important new facts in regard to the characters — occur- 
as 
“gah of old species. The larger portion of the book remains 
it was in the earlier edition except as regards ocea egal corree- 
tions, references, an The book has _ re-paged, and a 
new and complete index concludes the volum 
Ill. Borany anbd ZooLoey. 
a. sal abacdaee des K. Botanischen Gartens und des Botanischen 
zu Berlin. Band I, 1883.—The second volume of this 
new a eek ‘has promptly come to hand. Dr. Ercn.e ER, the Direct- 
or of Gardens, and Dr. Garcxsg, Ceram of the Museum, are asso- 
ciated in the editorship : the latter was the editor of the Linn nwa, 
Which the present publication supersedes. The leading article 
