ii CONTENTS. 
e. 
XVI. A Description of a New Form of Magneto-Electric Ma- oe 
chine, and an account of a Carbon Battery of conside- 
rable energy; by Otiver W. Gizzs, ‘ : - 132 
XVII. Electricity in Machinery ; by Azarian Smrtu, Jr. . 194 
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, . ° : ; ; : - 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. Aterr, 157 
XXI. Fragments of Natural History ; by Prof. J. P. Kirt- 
LAND, M.D., . ‘Se ee . 164 
MISCELLANIES.—DOMESTIC AND FOREIGN. 
1. DeCandolle, Prodromus Systematis Naturalis Regni Vegeta- 
bilis, &c., . : i : : ; ; = avi 
2. Endlicher, Genera Plantarum secundum Ordines Naturales 
dispositey gmt Se ys eee 
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., ies 
5. The Genera of South African Plants, arranged according to 
the Natural System, by Wm. Henry Harvey, Esq., . Me 
6. Presl, Tentamen Pteridographie seu Genera Filicacearum pra- 
sertim juxta venarum decursum et distributionem exposita, 174 
7. Dr. Siebold, Flora Japonica ; sectio prima, Plante ornatui vel 
usui inservientes ; digessit Dr. J. G. ZvccaRINI, — . - 1% 
8. Grisebach, Genera et Species Gentianearum, adjectis obser- 
vationibus quibusdam phyto-geographicis, - i ‘ 
9. The Journal of Botany, by Sir Wm. Hooker, K. H., Se, .. 177 
10, 11. Hooker; Icones Plantarum, or Figures, with brief de- 
scriptive characters and remarks, of new or rare plants, se- 
Te from the author’s Herbarium—Linnwza : Ein Journal 
fir die Botanik in ihrem ganzen Umfange. Herausgegeben 
von D. F. L. Von Schlechtendal, . é 1 
12. Lindley ; An Introduction to Botany, 
° Live, ATO 
