n CONTENTS. 



Page. 



XV. Effect of a contracted space in obstructing the Vibrations 



of a Mercurial Pendulum ; by George Baker, - 156 



XVI. Description of Fossil Footprints in the New Red Sand- 

 stone of the Connecticut Valley ; by James Deane, M. D. 



(With a plate,) 158 



XVII. Reply to a Notice of Shepard's Mineralogy, with various 

 Mineraloffical Observations ; by Prof. Charles Upham 



SHEPARDrM. D., 168 



XVIII. Abstracts of the Researches of European Chemists ; by 



J. Lawrence Smith, M. D., 181 



XIX. Bibliographical Notices : — On Dinornis, an extinct Genus 

 of tridactyle Struthious Birds, with descriptions of por- 

 tions of the skeletons of six species, Avhich formerly ex- 

 isted in New Zealand. By Prof Owen, M. D., F. R. S., 

 Z. S., &c., 194. — Ehrenberg's Observations on the Fos- 

 sil Infusoria of Virginia and Maryland, and comparison 

 of the same with those found in the Chalk Formations 

 of Europe and Africa, 201. — The Botany of the Ant- 

 arctic Voyage of H. M. discovery ships Erebus and 

 Terror, in the years 1839 — 1843. By Joseph Dalton 

 Hooker, M. D., R. N., F. L. S., 204.— Sir W. J. Hook- 

 er's Species Filicum, 205. — Dr. Maout's Lecons Elemen- 

 taires de Botanique, 206. — Martius's Systema Materise 

 Medico Vegetabilis Brasiliensis, 207. — Shortrede's Log- 

 arithmic Tables, 208. — McCartney's Principles of the 

 Differential and Integral Calculus, and their applications 

 to Geometry, 209. — Thomson's Elements of Geometry, 

 on the basis of Dr. Brewster's Legendre : New York Ge- 

 ological Survey, 210. — United States Exploring Expedi- 

 tion, 211. — Prof. J. F. W. Johnston's works on Agricul- 

 tural Chemistry, 212. — Miilder's Chemistry of Animal 

 and Vegetable Physiology : Bronn's Handbuch einer Ges- 

 chichte der Natur, 213. — Draper's Treatise on the Forces 

 which produce the Organization of Plants : Downing's 

 Treatise on the Theory and Practice of Landscape Gar- 

 dening, 214. — Guy's Principles of Forensic Medicine : 

 Hatfield's American House Carpenter, 215. 



Miscellanies. — Prof Henry's Experiments on Soap Bubbles, 215. 

 — Fossil Footmarks in Strata of the Carboniferous Series in 

 Westmoreland County, Penn., 217. — Formula of the Mason- 

 ite of Dr. Jackson, 218. — Tenorite : Sillimanite : Mr. Phil- 

 lips's Mineralogical Collection: Faye's Comet, 219. — Note 

 from Dr. Hare, correcting an error in his Strictures on Prof 

 Dove's Law of Storms : The Southern Journal of Medicine 

 and Pharmacy, 220. 



