AMERICAN GEOLOGISTS AND NATURALISTS. 59 



opinion with those eminently distinguished geologists who had ad- 

 dressed the Association on this topic. They were, however, such as 

 arose naturally in his mind while reflecting on what had passed 

 under his own observation. The facts on which they rested were 

 before the members, and so little was really known, so few had an 

 opportunity of witnessing this part of the aqueo-glacial agency now 

 going forward, he felt sure that they Avonld excuse his having tres- 

 passed on so much of their time in submitting at least these facts 

 for their consideration. 



In conclusion, Mr. Couthouy remarked, that he had in this paper 

 used the term aqueo-glacial to express the nature of the action of 

 water and ice* in connection w^ith the deposition of drift, rather than 

 that of giacio- aqueous, proposed by Professor Hitchcock in his me- 

 moir, not merely for its greater euphony, but because he thought it 

 more expressive of the relations of the transporting media, of which 

 water rather than ice was the predominant, or at least the active 

 agent, and therefore entitled to precedence in a descriptive phrase 

 like this. 



A communication was then read from Dr. Hale, inviting the 

 Association to make use of the library and rooms of the Ameri- 

 can Academy of Arts and Sciences. 



The Association adjourned to 



Tuesday, 3^ o'clock, p. m. — Prof. Wm. B. Rogers was called 

 1o the chair, in consequence of the indisposition of the President. 



Dr. Jackson exhibited drawings of the pot-holes described by 

 him in the morning, and gave a further description of the same ; 

 and the discussion of the morning was carried on by Prof. Henry 

 D. Rogers, Prof. Emmons, Prof. Hitchcock, ]Mr. Redfield, and 

 the chairman. 



Prof. Beck read a paper " on some Pseudomorphous or Para- 

 sitic Minerals of the State of New York," on which remarks were 

 offered by B. Silliman, Jr., Dr. Jackson, and Prof. Emmons. 



Mr. Vanuxem read a paper " on the Origin of Mineral 

 Springs," \yhich he followed by some remarks on the metallifer- 

 ous ores found by himself in the State of New York, together 

 with some observations in regard to fissures in rocks. 



Association adjourned to Wednesday, 9 o'clock, a. m. 



In the evening Prof. Silliman delivered a most interesting 

 address on the " Progress of Geological Science in the United 

 States," to the Association, in presence of the public, who had 

 been invited to attend. 



Wednesday, April 27th, 9 o'clock, a. m. — Association met 

 pursuant to adjournment. Dr. Morton in the chair. 



