Iy contents. 



Page. 



XIII. Caricography ; by Prof. C. Dewey, — (with a plate,) 140 



XIV. (1.) Remarks on the Alabama Meteoric Iron, with a 



Chemical Analysis of the drops of Green Liquid which 

 exude from it ; by Charles T. Jackson, M. D. (2.) Let- 

 ter from Mr. A. A. Hayes on the same subject, with re- 

 marks on the origin of the Chlorine found in the Alaba- 

 ma Iron, and a description of new methods employed in 

 the Analysis of Meteoric Irons, .... 145 



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 



Mineralogical Observations; by Prof. Charles Uphabi 



Shepard, M. 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, which 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 Logons Elemen- 

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

 Medicse 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. — Mulder's Chemistry of Animal 

 and Vegetable Physiology : Bronn's Handbuch einer Ges- 



