i 
ii CONTENTS. 
3. Sasponei New Mineral at Bolton, Mass. 
4, 5. New Locality of Crichtonite—Stilbite, Chabasie, ae villas 
minerals at Stonington, Ct. - 179 
6, 7. G Bchtonite in R. I1—Notice of the New Flora of North 
Arica now publishing by John Torrey and Asa Gray, 180 
8. Reif d’s Law of Storms Zovas of Lieut. Col. Reid’s 
work on hurricanes, - at +1 
9. Notice of Lea’s Observations on the genus Unie &e. - 184 
10. Notice of Holbrook’s North American HIREOIETs Vols. 
- - 186 
11, 12, Announcement of Second Part t to Shatants Descriptivs 
Mineralogy—Blowpipe mouth for oxygenand hydrogen, 187 
13. Salisbury’s Analysis of the Mineral Waters of Avon, N. ¥. 188 
14. Notice of Feuchtwanger’s Treatise on Gems, - 189 
15. Extreme heat at Cumberland, Md. in July, ie wg -;; 190 
16. Evidences of diluvial currents, &c. . ae... 191 
1. Notice of the American Almanac for 1839, | - Se) | 
19, 20. Green Feldspar and Galena—Fossil falta) in the red 
sandstone of New Jersey—U. S. South Sea PaNSeaey 
Se Exploring Expedition, - 
21. Annals of Natural ragga he or Sons of Zoology, og 
and Geology,  - £ Aa 
22.  Airsly ers of shat or Hy droite - —, ” 195 
4 ess ss Ov a pend ossil™ VILE : mii re. X ar. es 
Darwii, 196 
24, 25. Prowiitadol of the Wollaston Medal—On the Rapidity 
of Motion in Railway Cars which is consistent with safety, 197 
26. On the Gases contained in the Blood, and on Respiration, 198 
27. Eighth Meeting of the British Association for the Advance- 
ment of Science, - = ge - * - 
: NOTICES. : 
Any subscriber or agent who will send us either number of volume 
XII of this Journal, shall be paid for the same one dollar, provided it is 
sent without expense.—Eds. 
Acknowledgments to Correspondents will be published in the mext 
