84 



TRAINS OF BLOCKS. 



have had opportunity to examine the phenomena further, we will not venture to throw out our crude spec- 

 ulations as to the mode in which the slaty fragments have been thus arranged." 



TEAINS OF BOWLDERS. 



Fifteen years ago we gave an account in the American Journal of Science, of some re- 

 markable trains of angular bowlders, strewed almost in a strait line over the Taconic rang- 

 es of mountains southeasterly, some ten or fifteen miles, especially in the town of Rich- 

 mond in Massachusetts. They were remarkable for not being rounded at all, for being 

 strewed along as if by art in nearly straight lines, and with well defined borders, and also for 

 lying above the common rounded bowlders. Subsequently they excited much interest, and 

 were described anew by Prof. Henry D. Rogers and Sir Charles Lyell. In 1846 Prof. 

 Adams discovered and described a similar case on land of Mr. Butts, in Huntington, Ver- 

 mont, pointed out to him by Mr. Bunyan Bradley. One of our number has visited the 

 place, but we prefer to re-produce Prof. Adams' figures (Figs. 26 and 27) and description, 

 with a few slight corrections. 



a h is a hill of talcose slate 150 feet high, and g a small hill of the same rock, s y is a 

 narrow strip of syenite or perhaps hornblende rock, interstratified with the slate, numer- 

 ous blocks of which have fallen into the valley below, m n, and are strewed over the highest 

 hill and beyond it, as represented in figure 27, to i k, for a mile and a half. On the top of 

 the hill are striae, d d, running N. 15 W. as shown on the figure, and the line p r shows 

 where the section (Fig. 26) crosses the two hills. That section will show the dip and posi- 

 tion of the rocks and the bowlders. 



Fio. 26. 



Fia. 27. 



Prof. Adams suggests that pi-obably similar cases occur in other parts of the State, ami 

 we agree with him in opinion. But in other cases which we have met, the bowlders are 



