CONTENTS OF :VOLBUME ARIA: 
NUMBER LXXXYV. 
Art. I. On the Origination and Distribution of Species :—Intro- 
ductory Essay to the Flora of Tasmania ; by Dr. Joszrx D. 
“Hooker, 
II. Some General Views on Aochediney | ; by A. eos, ‘ 
III. On a new genus of Patelliform shells from the Cretaceous 
rocks of Nebraska; by F. B. Meex and F. V. Hayp EN.— 
(With a Plate.),  - 
IV. General account of the oe. of the a of the De- 
clinometer observations made at Girard College, Philadel- 
phia, between the years 1840 to 1845, with special refer- 
ence to the eleven year period; by A. D. Bacue, Super- 
intendent of the U. 8. Coast Survey.—( With a Diagram), 
VY. A Visual Method of effecting a Precise Automatic Compari- 
son of Time between distant stations; by Jonarnan Homer 
Lane.—(With a Plate.), : 
VI. On Osmious Acid, and the position - Ociatui’ in thi list 
of Elements; by Prof. J. W. Matter, - 
VII. ie Bese! and Tails of Comets; by Prof. W. H. C. 
Bar 
VII. Pi "Sodetil and Eleolite — Sslem, Massachusetts by 
J. P. Kimpatt, P.D., =- . 
IX. Description of Nine new species of Crinoidea Fem the Sub- 
carboniferous Rocks of Indiana and ss anaien ; by Sipney 
S. Lyon and S. A. Cassepay, . 
X. Theoretical Determination of the Sestinions of obits 
Comet ; by Prof. W. A. Norton, - ° é 
XI. Bc obics! Notices. No. X, 
XIL The Great Auroral Exhibition of Avgust 28th to Septem: 
ber 4th, 1859.—2d Article, 
XIII. On Numerical Relations existing Scees ani Equivalent 
Numbers of Elementary Bodies; by M. Carry Lea, - 
XIV. Remarks on the Dissolution of Field ce; by Cuas. Wurr- 
TLESEY, : 5 3 
Page. 
33 
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