Vl CONTENTS. 
Page. 
Triarthrus, proposed in the Monograph of the Trilobites 
of North America; by Prof. Jacozn Gresn, M. D., 341 
XIX. Remarks on the Barometer, with a table of Meteorologi- 
cal Observations, made on board of the U.S. Ship 
Peacock, from July 8th, to August 17th, 1837, during a 
passage from Peru to the United States, by way of 
Cape Horn, reported by W. S. W. RuscHENnBER- 
cER, M. D., - - - - - - - 345 
XX. Further proof of an annual Meteoric Shower in August, 
with remarks on Shooting Stars in general; by Ep- 
warp C. HERRICK, - - - - - - 304 
XXI. On a large and very sensible Thermoscopic Galvanome- 
ter; by Prof. Joun Locke, M. D., - - - 365 
XXII. Observations on a Hurricane which passed over Stow, 
in Ohio, October 20th, 1837; by Prof. Ext1as Loomis, 368 
XXIII. Rotary ie ge Ca or Astatic Galvanometer ; by Cuas. 
G. Paces, M. D., - - - = - - 376 
MISCELLANIES.—DOMESTIC AND FOREIGN. 
1. On the Meteoric Shower of November, 1837, - - 379 
2. Extraordinary case of electrical excitement, with preliminary 
remarks by the Editor, —- - - - : 2 394 
3. Impressions of feet in rocks, - - E “dae 398 
4. New locality of Iolite, with other minerals associated, - 399 
5. Caoutchouc, - = = 2 4 a e r, 400 
6. On Meteoric Showers in August, - - - - = 401 
7, 8. Brilliant Meteor seen in the day time—A Synopsis of the 
family of Naiades, - - - “ - : c 402 
9. Temperature of Lake Ontario,  - - = : 4 403 
10. Encrinite, Tufa, &c, ~ - - = J = Z i 405 
11. Description of a new Trilobite, - - - - 3 A406 
12. Difference between the English porcelain and that of Ger- 
many and of the continent, - - - - : 407 
13. Mathematical, philosophical, and chemical instruments, 408 
