ee a ee 
1886. | Botany. 63 
chemical and crystallographic standpoint. His paper is particularly 
interesting as a résumé of our knowledge in regard to these two 
minerals. In the same way F. Sansoni proposes: to study 
calcite. He begins his work with an exhaustive paper of fifty- - 
six pages on the crystals from Andreasburg.' He divides these 
into eight groups, according to their development, and then 
studies each group separately. Tables giving the frequency with 
which the 131 forms actually observed occur, and the combina- 
tions in which they are found, make up a considerable part of the 
article. 
MIscELLANEOUS.—A chemical examination of nocerite? from 
Samo-Nocera leads E. Fischer to consider it a mixed fluoride and 
oxide with the composition 2 (Ca Mg) Fl, + (Ca Mg) O.——In an 
article on the Thiiringian minerals, Luedecke® describes crystals 
of orthite, from near Schmiedefeld, with the two new planes 
5PGZand , Pj, ethers from a granitite near Brotterode with 
4 PS, and tiny brown anatase crystals on small quartz crystals in 
ee of a quartz porphyry from Brand, Thüringer 
ald, 
BOTANY.‘ 
Tue Asa Gray VasE.—During the meeting of the American 
Association for the Advancement of Science, at Ann Arbor, in 
ugust last, the presence of so many botanists, and especially 
their frequent club meetings, suggested to the editors of the Bo- 
tanical Gazette the possibility of some concerted action on the 
part of the botanists of the country to commemorate Dr. Asa 
Gray’s seventy-fifth birthday anniversary. After some informal 
consultation, the matter was left in the hands of the originators 
to be managed as they thought best. Accordingly, notices were 
grayi, Lilium grayi 
ella repens, Epigea repens. The beauty of design and finish, as 
' Zeitschrift fiir Krystallographie, x, p. 545- 
. > Zeitschrift für Krystallographie, X, p- 271. 
Ib., X, p- 187. 
- “Edited by Professor CHARLES E. Bessey, Lincoln, Nebraska. 
