a 
158 Association of American Greologists. 
A few suggestions may be made respecting the best modes of 
preventing the ravages of the Hessian fly. They have all been 
published before, by others, but they are of such a nature that 
there is little probability that any of them will ever exterminate the 
insect. ‘The stouter varieties of wheat ought always be chosen, 
and the land should be kept in good condition. If fall wheat is 
sown late, some of the eggs will be avoided, but risk of winter-kill- 
ing the plants will be incurred. If cattle are permitted to graze the 
wheat fields during the fall, they will devour many of the eggs. 
A large number of the pupe may be ‘oyed by burning the 
wheat-stubble immediately after hve then ploughing and 
harrowing the land. This method will undoubtedly do much 
good. As the Hessian fly also lays its eggs, to some extent, on 
rye and barley, these crops should be treated in a similar mannet. 
New Haven, Conn. 
Art. XV.—Proceedings of Learned Societies. 
I. Association of American Geologists. 
Tue second annual meeting of this Association was held du- 
ting the second week in April, at the rooms of the Academy of 
Natural Sciences in Philadelphia. The following is an abstract 
of the proceedings. 
Monday, April 5th, 1841, 4 o’clock, P. Mi—The Association 
met pursuant to the adjournment of last year. The regularly 
appointed presiding officers being absent, Prof. Henry D. Rogers 
was called to the chair. After the completion of some business 
arrangements, the Association adjourned until 10 o’clock, A. M. of 
Tuesday. 
Tuesday, April 6th, 1841, 10 o’clock, A. M.— The Association 
met pursuant to adjournment. Prof. Silliman took the chair. 
_ Dr. L. C. Beck was appointed secretary. Messrs. W. R. Johi 
son, Vanurem, H. D. Rogers, Mather, and Locke, were appoint 
ed a committee to report a plan of business for the meeting: 
€ subject of mineral manures having been referred at the 
last annual meeting, was proposed for discussion. Remarks were 
offered, and facts stated by Mr. Martin H. Boyé, Drs. Charles T: 
Jackson, James B. Rogers, J. Locke, and Mr. B. Silliman, Jr 
