Vili CONTENTS. 
&c., 439.—On Entophytes, by Dr. Lerpy, 441.—On Infusoria on the Teeth, by 
H. I. Bownprrcu, 442. 
Astronomy.—New Comet: Expected return of the great Comet of 1556, 442. 
Miscellaneous Intelligence.—On the Gradual Production of Luminous Impressions 
Ey 
the ie atte of Magnetical and Meteorological Instruments, 444.—Or 
the Cause of the Diurnal Variations of the Magnetic Needle, by W. H. Bar- 
Low, Esq., M.I.C.E., 445.—The Ruins of Nineveh, 447.—Oak Orchard Acid 
' Spring Water, by H Erni, and Wn. I. Craw, 449.—On the Cause of Au-~ 
rore Boreales, by Aucuste pe LA Rive, 450.—Charleston aes of the 
American Association for the Advancement of Science, 453. 
Bibliography.—Proceedings of the American Association for the Advancement of i 
Science: The Annual of Scientific Discovery, or Year Book of Facts in Science 
and Arts, &c.; edited by Davin A. Wetts and Groner Briss, Jr.: Th 
Physical Atlas of Natural Phenomena, by AtexanpEeR Keiru Jonnston, 454. 
—Lake Superior, its Physical Character, Vegetation and Animals, compared 
with those of other and similar Regions, by Louis AcAssiz, with a narrativeof 
the Tour, by J. Eruror Cazor, 455.—A Natural Scale of Heights, &c., con- 
structed by Miss Corrnurst: The East; Sketches of Travel in Egypt and the 
Holy Land, by Rev. J. A. Spencer, M.A.: Man Primeval, or the Constitution 
and Primitive condition of the human being, &c., by Jouw Harris, D.D.: A 
Systematic Treatise, Historical, Etiological and Practical, on the Principal dis- 
eases of the Interior valley of North America; as they appear in the Caucasian, 
African, Indian and Esquimaux varieties of its Population, by Dawret Drake, 
M.D., 456.—Transactions of the Society of Arts for 1846-7 and 1847-8: A Uni- 
versal Formulary, containing the Method of preparing and administering Eu 
cinal and other Medicines, the whole adapted to Physicians and Pharmaceu 
by R. Eacuesrexp Grirriru, M.D., 457 
List of Works, 458. 
Index, 459. 
ERRATA. 
Page 4, line 11 from bottom, for ‘ zinc,’ read ¢ wir 
P. 20, 15 top, for ‘ acid in chlorine,’ read ‘acid and chlorine.’ 
top, for *‘ Wutz,’ read ‘ Wur 
P.2 2 18, “ 6 “ bottom, for ‘ 1227-75,’ read * 1227-45,’ and erase first half of 
next line 
ee ae opt for Bigg! age 2957, 
P. Bb, 17 Ps ‘ soda,’ read ‘ potash.’ 
£407, © 13 ee “Pecndonrphi read ¢ cs ed grea 
Sag 419, bottom tine, for date read ‘soda, and t 
Vol. Vill, PEs , line 15 from to op, for Chester oP read ‘ Delaware Co.” * 
‘ in table, bee see for ‘ Emerylite, Pocueylvaniia? peer ‘Mar- 
garite.’ 
‘ * a Loads read ‘ Emerylite. ag oe 
“secon he! or the numbers of the analyses 
4,5, mubstvate, 1,8, 4, 5,2 a Maer err 
p. 387, in formula of Kyanite, for ye mite goad ae Biz.’ 
“ p- 387, line 23 from top, for ‘ 775°,’ 
