INDEX. 
Planorbis, ae species, 193. 
Platinum, new com of, 186, 
large quantity melted , 163 
Polarized light. ox 
used to exhibit 
Peak light by m 
ont Pr of, on sere Sa of light, 
, 155. 
Abate blowpipe 
on a peewee 
ave t cory, 108 
~ Prayer in the Mende language, 4 
r cme 108 dynamical, new mode of solv- 
106. 
, Proceedings of Boston Society of Natu- 
ral History, 396. 
American Philosophical 
Society, 153, 396, 
R. 
Redfield, W. C., abstract of meteorolo- 
gical eo made at Canton and 
St. John ae" 
ract of meteorological 
register 1 ian York, 1838 and 
1839, 323. 
Refractive indices, 107. 
sorta of the air to railway trains, 
Resisting medium, probable effects of, 
Rocks, classification of, 408. 
Roge ee rof, on the tertiary of 
irg “iad 
Ruminants, follicular dentition in, 129. 
Rutland county, Eng., statistics of, 135. 
8. 
Salts, haloid, existing in solution, 118. 
Sch oe zer,G., analysis beige: water, 12. 
Ly 
Sea, = ermin 
ay 
415 
a shooting, of Aug. 9 and 10, 1839, 
seen at Canton, Aug. 10 
and 11, 1839, 301. 
Statistics ot “arial 135. 
inal, of hanland and Wales, 
135 
tea am, — govity of, at different 
temperatures, 137. 
team Nav vigationk Journal, 205, 
Steam ship Savannah, ‘her log book, 155. 
Stevelly, on ne wind, and rain n, 105. 
on filling barometers 
Stomach, ated of muriatic acid in 
9. 
s Blandingii, 195. 
fis as and reptiles 
chusetts, 379. 
Squalus elephas, 197 
fifteen species of Ohio fishes, 
392 
two species of mk described 
sie, John, letter - Prof Silliman, 407. 
yngnat s, taken 
yomdyaty y “of fhe: Orehis tribe, 506. 
1. 
'Paber, Thomas, practical remarks on 
s, 61. 
Tails 0 of comets, 35. ; 
Talbot, on Degeeiee s photogenic pro- 
cess, 97. : 
eeth of m sage in Suffolk, England, 
described by Lyell, 124. 
si en,127. 
scopic structure - 134. 
© hoe of Virginia, by Pro 
ge 
=a 
Teschemacher, J.E., on Elvella esculen- 
ta, 194. 
minerals found 
Bevalar usigh 
a connection rial Abner of re earth, 
gente of new v vitok , 134. 
Spectr m, or Sage = observations on, by 
Sir J. Herschel, 110. 
teed st of plate glass 
8 3, inietiatenne of, to be ‘revised, 9A, 
reduction ose in the Coelum 
Australe 
reduction of those in the Histoire! 
Celeste, 94. 
eecaioh of the a So- 
at Milk row, 194. 
plants from Black- 
stone river, 195. 
riana, 196. 
Andromeda ma- 
fossil coals and 
madrepores, 197. 
Theory of the earth in Bs with 
secular magnetic variatio 
Tin, metallic, action of on mail of tin, 
Tornadoes, notices of, by R. Hare, 73. 
(Ersted’s memoir on, 82. 
Tornado at Chaseney, near Paris, 77. 
Providence 
ye Be, 
um. se Ithiel, his improvements in bridg- 
Tracks of animals in variegated sand- 
ciety’s Catalogue, 
stone 
Troost, Prof. G., analysis of a meteoric 
mass, 200. 
