'/ 



C3 



133 



Taconic ranges and Lenox mountain to Beantown mountain. They 

 are a variety of talcose slate, which can be traced directly to a moun- 

 tain in Canaan, New York, beyond which they are not to be found. 

 Their number is very great, and they vary in size from that of two or 

 three feet to blocks which weigh more than thirteen hundred tons. 

 They are not at all rounded on their edges, and therefore must have 

 been carried, not driven, pellmell along the uneven suface. These 

 trains, especially one of them, are remarkably straight and well denned, 

 looking as if artificially strewed over the surface ; for they are confined 

 to the surface, and do not mix with the rounded drift beneath. At one 



point the general course of the train is changed from east 34° south to 

 east 56° south. They were first pointed out to Prof. H. by Dr. S. Reid, 

 of Richmond. 



Only one case at all analogous has fallen under the Professor's notice, 



and that is described by Mr. Darwin, in the Falkland Islands. Vast 



quantities of blocks are there strewed along the valleys, so as to form 



'streams of stones." But they lie in the bottom of the valleys, or in 



e lowest places along their track, and therefore seem to have been 



produced in a different manner from those in Berkshire, which pass ob- 



quely across ridges from four hundred to seven hundred feet high. 



e Professor thought that this case could not be explained by any of 



prevailing theories of drift. It seemed to him absurd to imagine 



currents of water, however violent, could have thus strewed in a 



^g t line so various a train of blocks not at all rounded. Icebergs 



not have- done the work much better : since a multitude of sue- 



ones must pass over the same spot and along the same line. 



rains do indeed resemble the medial moraines of glaciers, and 



J!. rains tran sported by packed ice on large rivers. But it seemed 



h a , P ossl ble to conceive how either a glacier or a river could ever 



existed in this region. The case, however, is an instructive one, 



pi - ° rms ° ne of the phenomena of drift, which the theorist must ex- 



plain, 



or his theory will not stand. 



ject 77 ' nterestin o at >d extended discussion followed on the sub- 



. ° 'Drift," (which occupied the remainder of the evening,) 



ween P ro f Johnson, Profs. H. D. and IF". B. Rogers, Lieut. 



«*>% Mr. Redfidd, Mr. Tuomey, Mr. Hall, Dr. King and 



w yes ' 0n motion ' k was ~~ 



thei 1 • ^ , ^ at tne me mbers of the Association tender to Dr. Locke, 

 ha- , lrrnan > their sincere thanks for the zealous manner in which he 



£ e , ed at their deliberations during this session, 

 'oss b ° i €d ' ^ hat tlle me mbers of this Association deeply lament the 

 \!r » eath durir >g the past year of their esteemed associates, Mr. 

 *•*« ^d Prof. Hall. 



