e 
iv CONTENTS. 
XV. Brief Synopsis of the Principles of Jaurs P. Espy’s 
Philosophy of Storms, > : ° . : 
XVI. A Description of a New Form of Magneto-Electric Ma- 
chine, and an account of a Carbon Battery of conside- 
rable energy ; by Otiver W. Gizzs, : 
XVII. Electricity in Machinery ; by Azariau Situ, Sta 
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. Wat- 
TER R. Jounson, . : ‘ ‘ : ‘ 
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 ; b 
Amos Eaton, : : ; ‘ Z . ° 
XX. Notice of Minerals from New Holland; by F. Aterr, 
XXI. Fragments of Natural History ; by Prof. J. P. Kirt- 
LanD, M.D., . : ° ; ° : : 
a MISCELLANIES.—DOMESTIC AND FOREIGN. 
Page, 
157 
164 
1. DeCandolle, Prodromus Systematis Naturalis Regni Vegeta- 
168 
bilis, &e. , . ‘ 
2. Endlicher, Genera Plantarum secundum Ordines Naturales 
ita, "Th 
isposita, . . ‘ jivate . . . 
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, &e., . : . 
5. The Genera of South African Plants, arranged according to 
the Natural System, by Wm. Henry Harvey, Esq., . . 
6. Pres], Tentamen Pteridographie seu Genera Filicacearum pre- 
sertim juxta venarum decursum et distributionem exposita, 
7. Dr. Siebold, Flora Japonica ; sectio prima, Plante ornatui vel 
usui inservientes ; digessit Dr. J.G. ZuccaRInt, .  . 
8. Grisebach, Genera et Species Gentianearum, adjectis obser- 
vationibus quibusdam phyto-geographicis, eres 
9. The Journal of Botany, by Sir Wm. Hooker, K. H., &c., 
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—Linnea: Ein Journal 
far die Botanik in ihrem ganzen Umfange. Herausgegeben 
von D. F. L. Von Schlechtendal, . . ‘ ‘ ‘ 
173 
174 
175 
176 
177 
