CONTENTS. 
Proceedings 
marks on the Aurora of Feb. 13th, 1892. By Joun Tartock, JR. 
Proceedings: March 7th, 1892. Business Meeting a2 ae ° : 
‘* Ancient Astronomical Instruments.’’ By Prof. J. K. Rees . 3 
Proceedings: March 14th, 1892. Stated Meeting . : ° . 
The Evolution of the Horse. By Prof. Henry F. Osporn : ° 
Proceedings: March 21st, 1892. Stated Meeting . ° . ‘ : 
Lecture: ‘‘The Contributions of Organic Chemistry to Modern Medi- 
cine.”? By Prof. A. H. Exuiorr . é = - : - : 
Remarks on the Discovery of Chloroform. By Dr. 4. Carrineron 
Bouton . A . . . : tas ‘ oie 
Proceedings : Stated Meeting, Maron 28th, Si eer 5 : : : 
Notes on the Minerals, Gems, and Ethnology of the Ural Mountains 
as observed during a recent trip. By Grorcx F. Kunz eek 
Proceedings: April 4th, 1892. Business Meeting . “ i 
Report of Observations on Comet of 1892 Swift made ae “dlanitle 
College Observatory. By Prof. J. K. Rezs . me 2 
The Rutherfurd Photographic Measures of the Stars ae B Cyan 
By Haroup Jacosy . c . . : < < 
Proceedings: April 11th, 1892. Stated Heating : . ° 5 
Chemical Arts in Bible Times. By H. Carrincron Borron .  . 
Proceedings: April 18th, 1892. Stated Meeting . > : c 
Lecture: ‘‘ Elves of the Air.’? By Dr. Auexts A. Sara ° . 
Proceedings: April 25th, 1892. Stated Meeting . : . 
Note on a Collection of Tertiary Fossil Plants from Gis Pasco ic 
Potosi, etc. By Dr. N. L. Brirron . : = . ° . 
Proceedings: May 2d, 1892. Business Meeting . 6 A 5 
Further Experiments in Connection with Vacuum Discharges: By 
Dr. M.I. Pupin . “ > : 5 2 : . 
Remarks by Mr. Jacosy on Stars surrounding 8 Cygni 5 ; ° 
Proceedings: May 9th, 1892. Stated Meeting x ; 
A Catalogue of the Fishes of the Pacific Coast of inion North of 
Cerros Island. By Caru H. Eic—nmann and Rosa 8. EigENMANN. 
(By title.) . . . : : . 
Notes on the Phalangida of the United States. By oe S. Banks. 
(By title.) . ° ° : . . . Ratios ai 
Coleopterological Notices Iv. By Pavwly L. Caszy. (By title.) . 
Recent Researches on the Solar Spectrum. By L. H. Laupy . . 
[ Continued on page 3. 
: February 29th, 1892. Stated Meeting (continued). Re- 
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