CONTENTS. v 
on Notices.—On the genus Peasia: On the genus Bipaliura, ie Wa. Stimpson, 
—The Museum of Comparative Zoology in Cambridge, Mass., 
Astronomy and Meteorology.—Three more Asteroids: New Comet: Further observations 
m the Shooting Stars of August 9-10, 1860: At Chicago, HI., by Mr. Feancis Brap- 
LEY and others, 136.—Paris, France, by M. Coutvier-Gravier : Rome, Italy, by M. 
Srccui: Shinai Stars in November, i860: Near Cape Hatteras: New Haven, Conn., 
137.—New York City: Montgomery Co., Md., 138.—Bloomington, Ind.: Narrative of 
the American Expedition to N.W. British America, to observe the total Selar Eclipse 
July 18th, 1860, by Wm. Ferren, 139. 
Book Notices. —On the Impurities of Commercial Zinc, with Special Reference to the 
Residue insoluble in Dilute Acids, to Sulphur, and to Arsenic, by Cuaries W. Exiot 
and Frank H. Storer, 142,—A Practical Treatise on Coal, Petroleum, and other dis- 
tilled Oils, by ABRanam Gesner, M.D., F.G.S., 147.—General Problems from the Or- ~ 
or ae: pies. of Descriptive Geometry, etc., by Prof. S. Epwarp Warren, 
- ooke’s Chemical Physics : Sillimon’ s Principles of Physics, 149. 
oe Sia Fatelligence.—Earthquake, 150 —T'wo new Meteorites, by J. Law- 
ENCE SMITH, 1 
po P. Espy, 151.—David Dale Owen, 153.—Mr. S. A, Casseday, 155, 
Bibliography—By J. Nicxugs, 155. 
Proceedings of Societies, 156. 
NUMBER XCIHIl. 
Arr. XIII. On the Appalachian Mountain Eanes Prof. Ar- 
noLD Guyot.—( With a map), 157 
XIV. On the Formation of Picramic Pe bp. M. Kesar ree 188 
XV. Remarks on a proposed Process for the Estimation of Nitro- 
gen, and on an Acidimetric Process, by the same, - - 189 
XVI. On the Dimorphism of — vsti and Zine; by 
Josian P. Cooxs, Jr., -- - 191 
XVII. General Account of the Redes of Part Th of the ili 
sion of the Declinometer Observations made at the Girard 
College, Philadelphia, between 1840 and 1845, with special 
reference to the Solar Diurnal Variation and its Annual In- 
; apie te a. U, ere bed ss U. S. Coast aaa Le with 
a pla °? 
XVIIL T fe Silurian Beds of en Denpenieet and 
Dr. F. Roemer’s Monograph ; by Prof. J. M.Sarrorp, - 205 — 
XIX. Correspondence of Joacuim Barranpg, Sir Wiuuiam E. 
Logan and James Haut, on the Taconic System and the age 
of the Fossils found in the Rocks of Northern New England, — 
and the Quebec Group of Rocks.—I. Introductory Remarks, 210 s 
Hl. On the Primordial Fauna and the Faconic System o OF ne 
ay 
