CONTENTS. vii 
Miscellaneous Scientific Intelligence-—Researches on Gun-cotton, Second memoir. 
On the Stability of Gun-cotton, by F. A. Azer, F.R.S., etc., 288. ow party 
for Sitka: American Association for the Advancement of Science, 2 
Obituary—Jeremiah Day, 291.—E. J. Pickett, 292.—Faraday, 293. 
Miscellaneous Bibliography— Annals of the Astronomical Observatory of Harvard 
llege, 293.—The Chemical News, and Journal of Physical Science, 294—A 
Treatise on Astronomy, Spherical and Physical, etc., by Wimtram A. Norton, 
M.A., etc.: Elements of Chemistry, Theoretical and Practical, by Witt1am AL- 
isn Miter, M.D., etc.: A Popular Treatise on Gems in reference to their sci- 
entific ihe, etc., by Dr. L. Fevonrwanerr: Annual of the National Academ 
of Sciences for 1866: Memoirs of the Boston Society of Natural History, 295. 
—Transactions of the American Entomological Society, 296. 
Proceedings of Societies, 296, 
NUMBER XXXIL 
Page. 
Arr. XXXII. Address of Georce Bentuam, President, read at 
the so: ca rei ei of the Linnean pacss on Frente 
May 24, 1867, 297 
XXXII. me hai of Sunlight on Glass ; a jesse Aawunins 316 
XXXIV. Remarks on Prof. Geinitz’s views respecting the Upper 
Paleozoic rocks and fossils of Southeastern Nebraska; - 
F.B.Meex, - - - - 327 
XXXV. Indian Summer; by Jecken E. Ws - - 340 
XXXVI. A method of détermining the anata of Peeks of ' 
Iron in Silicates not soluble in the pies mineral acids ; 
by Jostan P. Cooxz, Jr., - - - 347 
XXXVII. The Parks of ‘ides - - 851 
aries Contributions to the — of iors Scotia: by 
. C. Marsn.—No. 1. Ledererite identical with Gielinite 362 
ene Notes on Fossils recently obtained from the Laurentian 
ca . serie and on objections to the organic nature of 
Eozoo y J. W. Dawson and W. B. Carpenter, - - 367 
XL. Reply to oh Gabb on the Cretaceous rocks of —e 
Oe 7, Bee 376 
XLI. Geographical Notices, - - 377 
XLIL On normal and derived acids ; oe Bei F, Soon - 384 
XLII. Crystallogenic and Crystallographic Contributions; by 
James D. Dana. On the Feldspar group of Minerals: su 
plementary to Art. XXIX: On the Chemical Formulas of the 
Silicates, 398 
XLIV. On certain oe in ad s theory of. Atomicie me “Wor 
cotr GipBs, - - 409 
