AMERICAN GEOLOGISTS AND NATURALISTS. 29 



far as Bolton, while none can be found to the north of the lo- 

 cality. 



He considered the power of the diluvial current greater to the 

 north than at the south, since the evidences of it in Maine are 

 much greater than in Rhode Island ; bowlders have been found 

 on Mount Katahdin as high up as four thousand feet ; he thought 

 there was no evidence of any elevation of the rocks after the 

 diluvial ciuTcnt had passed. 



Mr. Nicollet proposed, at a future meeting, to make some 

 remarks upon, and to exhibit specimens from, the cretaceous for- 

 mation on the Upper Missouri. 



Mr. Redfield expressed a wish that the attention of the As- 

 sociation should, at some convenient time, be called to the recent 

 sand formation along the eastern coast of the United States. 



Adjourned to meet this afternoon at 4 o'clock, at the rooms of 

 Mr. Richard C. Taylor, for the purpose of viewing a model of 

 the coal region of Dauphin and Lebanon counties, east of the 

 Susquehanna. 



Thursday, 4 o'clock, p. m. — The Association assembled at 

 the rooms of Mr. Taylor, where that gentleman exhibited a highly 

 interesting model in plaster of the Dauphin and Lebanon Coal re- 

 gion, embracing, altogether, an area of seven hundred and twenty 

 square miles, showing the range of the mountain elevations, with 

 their relative height and position ; also their elevation above tide 

 level ; the dip of the rocks, the position of the coal seams, and 

 much other Liseful information. 



Mr. Taylor accompanied this exhibition with remarks explan- 

 atory and statistical, in relation to this coal region, and made 

 some observations on the importance of this mode of exhibiting 

 the geological features of a country, expressing the hope that the 

 day would come when models of this kind, representing the sev- 

 eral states, and even the whole United States, shall be constructed. 

 He also enlarged upon the propriety of following, as closely as 

 possible, the actual conformation of the country in drawing sec- 

 tions, and of adopting uniform modes of illustration by colors, 

 &c., and the importance of an equal scale of extension and eleva- 

 tion, as far as practicable in such sections. 



Prof. H. D. Rogers followed with observations upon the 

 Pennsylvania coal formations and the range of their underlying 



