IV CONTENTS. 



Page. 



XV. Brief Synopsis of the Principles of James P. Espy's 



Philosophy of Storms, 120 



XVI. A Description of a New Form of Magneto-Electric Ma- 

 chine, and an account of a Carbon Battery of conside- 

 rable energy ; by Oliver V^. Gibbs, . . . 132 

 XVII. Electricity in Machinery ; by Azariah Smith, Jr., . 134 

 XVIII. Notice of a Report of a Geological, Mineralogical and 

 Topographical examination of the Coal Field of Car- 

 bon Creek, with an analysis of the Minerals, accompa- 

 nied by Maps, Profiles and Sections ; by Prof. Wal- 

 ter R. Johnson, . 137 



XIX. References to North American localities, to be applied 

 in illustration of the equivalency of Geological Depos- 

 its on the eastern and western sides of the Atlantic ; by 



Amos Eaton, 149 



XX. Notice of Minerals from New Holland ; by F. Alger, 157 

 XXI. Fragments of Natural History ; by Prof. J. P. Kirt- 



LAND, M. D., 164 



miscellanies. — domestic and foreign. 



1. DeCandolle, Prodromus Systeraatis Naturalis Regni Vegeta- 



bilis, &c., ......... 168 



2. Endlicher, Genera Plantarum secundum Ordines Naturales 



disposita, ......... 170 



3. 4. Hooker, Flora Boreali-Americana, or the Botany of the 



Northern parts of British America, &c. — Hooker and Arnott, 

 the Botany of Capt. Beechey's Voyage, &c-, . . . 172 



5. The Genera of South African Plants, arranged according to 



the Natural System, by Wm. Henry Harvey, Esq., . . 173 



6. Presl, Tentamen Pteridographiae seu Genera Filicacearum prse- 



sertim juxta venarum decursum et distributionem exposita, 174 



7. Dr. Siebold, Flora Japonica ; sectio prima, Plantae ornatui vel 



usui inservientes ; digessit Dr. J. G. Zuccarini, . . 175 



8. Grisebach, Genera et Species Gentianearum, adjectis obser- 



vationibus quibusdam phyto-geographicis, . . . 176 



9. The Journal of Botany, by Sir Wm. Hooker, K. H., &c., . 177 



10. 11. Hooker ; Icones Plantarum, or Figures, with brief de- 

 scriptive characters and remarks, of new or rare plants, se- 

 lected from the author's Herbarium — Linnsea : Ein Journal 

 fur die Botanik in ihrem ganzen Umfange. Herausgegeben 

 von D. F. L. Von Schlechtendal, 178 



