290 PROCEEDINGS OF THE AMERICAN ACADEMY 



Gen. HYPOPTERTGIUM, Brid. 



130. H. Brasiliense, Sulliv. in Bot. U. S. Expl. Exped. p. 26, t. 

 26. — Rocks, in dense woods. 



Gen. PHYLLOGOXIUM, Brid. 



131. P. FULGENS, Hedw. Muse. Frond, t. 39. — Trunks of trees. 



In this interesting collection are to be found eight or ten other spe- 

 cies, several of them doubtless new, but the specimens are too imperfect 

 for satisfactory identification or description. 



Mr. F. H. Storer made the following remarks, in behalf of 

 Mr. John M. Ordway and himself, upon 



The Frozen Well at Brandon, Vermont. 



Respecting the geological situation and general character of this 

 remarkable well, which has been fully and accurately described by 

 others,* we have nothing new to offer ; but we desire to call the 

 attention of the Academy to an important phenomenon that appears 

 to have escaped the notice of previous observers. On visiting the 

 locality in the early part of the present summer, we ascertained the 

 existence of a variable but well-marked current of cold air continually 

 flowing upwards out of the mouth of the well. 



When we first visited the spot, in the morning of the 8th of June, 

 the external air being somewhat cool, the ascending current was not 

 noticed ; but returning at two o'clock in the afternoon for a more 

 thorough examination, the atmosphere having in the mean time be- 

 come uncomfortably warm, we at once became sensible of a x*ush of 

 cold air on bending over the well-curb to look down. This current 

 was still more distinctly felt by placing the hand down near the mouth 

 of the well. Bits of any light material drojjped in were buoyed up 

 ■ and forcibly blown out. The mature pappus of the dandelion, which 

 was then in full puff all around, afforded an abundance of very sen- 

 sitive current indicators. Rolls of paper, slightly damp, being burned 

 just within the mouth of the well, furnished volumes of smoke, which 

 were rapidly expelled, and not only confirmed the existence of a 



* See Proceedings of the Academy for 1859, IV. 269. Proc. Boston Soc. Nat. 

 History (1859-61), VII. 71, 74, 81. Wells's Annual Sci. Disc, 1860, p. 316 ; 

 compare Ibid. 1856, p. 190. 



