VI CONTENTS. 



Page. 



III. Hawaii, (Owyhee,) and its Volcanic Regions and Pro- 



ductions ; with notices of its inhabitants, and of those 



of Oahu, - - . - - - 228 



IV. List of the Plants of Chile ; translated from the Span- 



ish by Dr. Ruschenberger, U. S. N. 248 



V. Meteorological Tables ; by Gen, Martin Field, 261 



' VI. On the Achromatic Microscope ; by Edward Thomas, 265 

 -VII. On the employment of Sulphate of Copper, &c. in the 

 making of Bread, presented to the Board of Health 

 of the department du Nord, (April, 1830); from the 

 French of M. Kuhlmann ; translated by J. Griscom. 269 

 VIII. Chemical Examination of the Bark of the White Birch ; 



by Owen Mason, of Providence, R. I. - - 282 



IX. On Analytical Geometry ; by C. Wilder. - - 285 



X. On Central Forces ; by Prof. Theodore Strong, 291 



XL An easy solution of a Diophantine Problem ; by A. D. 



Wheeler, _ . - - . 295 



XII. Halos. — Solar and Lunar, ... 297 



XIII, Notices of Eminent Men deceased in Great Britain, 300 



XIV. Observations and Experiments on the rapid production 



of Steam in contact with metals at a high tempera- 

 ture ; by Prof Walter R. Johnson, - - 308 

 XV. Safety Apparatus for Steam Boats : by Prof. A. D. 



Bache, - - - - - - 317 



XVI. Review of Prof. Renwick's Treatise on the Steam 



Engine, . - - - - - 322 



XVII. On a Reciprocating motion produced by Magnetic At- 

 traction and Repulsion ; by Prof. Joseph Henry, 340 

 XVIII. Description and History of a new Plant, Tullia Pyc- 

 nanthemoides ; by Dr. M. C. Leavenworth. (With 

 a drawing,) ----- 343 



XIX. Notice of the method of manufacturing the smoking 

 Sulphuric Acid, as practiced in Germany ; by Thomas 

 G. Clemson, ----- 347 



XX. Observations and Experiments on Light and Vison, and 



the cause of prismatic analysis ; by Dr. C. Conwell, 350 

 XXI. On Storms and Meteorological Observations ; by Prof. 



E. Mitchell, ----- 361 



XXIL Report of Messrs. Cooper, Smith, and De Kay, on Fos- 

 sil Bones from Big Bone Lick, Kentucky, - 370 

 XXIIL Prof Olmsted's Reply to Dr. Christie on Hail Storms, 373 



MISCELLANIES FOREIGN AND DOMESTIC. 



NATURAL HISTORY. 



1, 2. The Planera, formerly called the Siberian Elm — Change 

 of climate ; diminution of temperature on the surface 

 of the earth, ----- 377 



3. Monography of the genus Cyprsea, - - - 379 



