﻿VI CONTENTS. 



XL 



Pasre. 



XII 



Recent; by Prof. J. W. Bailey, — (with a plate,) - 321 



rous Series in Westmoreland County, Pennsylvania ; by 

 Alfred T. King, M. D., 



343 



XIII 



and temperature ; by James D. Whelpley, - - 352 

 XIV. On the hypothesis of Mr. Prout, with regard to Atomic 



Weights ; — in a letter from Berzelius, - - - 369 

 XV. On the Drift Ice and Currents of the North Atlantic, with 



a Chart showing the Observed Positions of the Ice at va- 

 rious times ; by W. C. Redfield, .... 

 XVI. Notice of a mass of Meteoric Iron found at Cambria, n> ir 



373 



Lock-port, in the State of New York ; by B. Silliman, Jr. 388 

 XVII. Bibliographical Notices : — Repeat of the Commissioner of 



Patents for 1844, 392.— Dr. Jackson's Final Report on 

 the Geology and Mineralogy of the State of New I lamp- 

 shire, with Contributions towards the Improvement of 

 Agriculture and Metallurgy, 393.— The Taconic System, 

 based on Observations in New York, Massachusetts, 

 Maine, Vermont, and Rhode Island, by Prof. Ebenezer 

 Emmons, M. D. : American Quarterly Journal of Agri- 

 culture and Science : Prof. Johnson's Report on Ameri- 

 can Coals to the Navy t Department of the United States, 

 394.— Vestiges of the Natural History of Creation, 395. 

 Miscellanies.— Remarks on Uranium and Pyrochlore, in reply to 

 Prof. Shepard, by J. E. Teschemacher, 395.— Note on Pseu- 

 domorphism, by James D. Dana, 397.— Gold of North Caro- 

 lina, 398.— Geological observations on the region near Cen- 

 terville, Alabama, 399.— An Intermittent Spring : New Med- 

 als, Pelopium and Niobium, 400.— New Metal Ruthenium : 

 Musical Tones produced by Magnets, 401.-Atomic Weight. 

 of Copper, Mercury, and Sulphur : De Vico's Comet : outh- 

 ern Comet of December, 1844, 402. -D' Arrest's Comet : 

 School for the study of Elementary and Analytical Chemis- 

 try, 403 -Geological Survey of Canada : Geological Sur- 

 vey of Vermont : Lyceum of .Natural History in New York : 

 Association of American Geologists and Natura *, 404. 



