CONTENTS. 
SCIENTIFIC INTELLIGENCE, 
sics.—On the Blue Color of the Sky, the Polarization of Skylight, and on the 
ictesticn of Light by Cloudy matter generally; by Joun Tynpat, 258.— 
Note on the Formation and Phenomena of Clouds; by Jonn Tynpatt, 268. 
Geology.— Artesian Well at Terre Haute, Ind.; in a letter from Prof. A. Guyot to 
J. D. Dana, 270.—Prof. W. P. Shimper’s work on Vegetable appa ni 2. 
—On the Physical Cause of the Motion of ao ers; by JAMES CROLL, 
On some Reptilian remains; by Prof. Cope: Sulphur Deposit pf the antes of 
Saba, in the Dutch West Indies, (from a ‘eso on the Deposit, by N. 8. Hie- 
GINS,) 278 
Astronomy.—Prizes for the discovery of Comets, 279.—On the somes = 
_ Light, Heat, and Sound accompanying the fall of Meteorites; by 
Haringer, 280.—Note on the a of the Stars; by Witntam $f oGeie: he 
Total Eclipse of August 7, 1869, 
Miscellaneous Scientific Intelligence —Highteenth Meeting of the American Asso- 
E ciation for the Advancement of Science, held in Salem, Massachusetts, Aug. 18 
.. 26, 1869, 289.—Large Trees in Australia: Scientific Cotesions of Dr. Shumard, 
294.— Obituary.—Dr. B. F. Shumard, 294.—J. Beete Jukes, 2 
scellaneous Bibliography.—Machinery and is of the Industrial Arts, and 
Apparatus of the Exact Sciences; by FRepERICK A. P. BARNARD: Proceed- 
ings of the American Association for aoe aia! of Science, Seven- 
teenth Meeting. held at Chicago, Illinois, August, 1868, 
Proceedings of Societies, etc., 298. 
NUMBER CXLIV. 
Arr. XXIX.—Historical and Geographical Notes on the is 
earliest Discoveries in America; by Henry Srevens,.. 299 
XXX.—Summary of Results of a late Geographical Recon- 
noissance of Louisiana; by Eugens W. Hizearp,..... 331 
—Contributions Goin the Laboratory of the Lehigh 
‘University, No. I.—On certain compounds of Chro- 
mium with Iron; by J. Haynes H. Corsry,.......... 346 
XXXII—Contributions from the Laboratory of the Lehigh 
University. No. U.—Examination of a supposed Her- _ 
cynite; by Crarence A. WOLEE,........ 0020.00.55. 850 
—Contributions from the i thoratory of the Shef- 
field Scientific School, Yale College. No. XXIL—On 
the proximate Composition of several varieties of Amer- 
dean Maize; by W. O. ATWATHE PRO... e... i. 352 
