GLACIAL DRIFT. 247 



rough blocks near the road on the east side of the valley, on the south 

 flank of Black .mountain, which are to be regarded as lateral moraines, 

 opposite to those mentioned at Gray's, but higher up. 



A sixth set of moraines crosses the valley at a new saw-mill near Mrs. 

 E. Gray's, two and a quarter miles north of the bridge, and 255 feet 

 higher. Above this point the valley keeps the same contour as far as 

 Johnson's mill, 150 feet higher, and more than a mile distant. No well 

 marked local phenomena display themselves here, nor higher up, along 

 the carriage-road. Possibly a search in the wooded tract adjacent to the 

 stream might reveal something interesting above Johnson's. A cut in 

 the drift here shows it to belong to the lower till. Opposite L. Went- 

 worth's, nearly a mile above Johnson's, is an esker, or kame, 1,000 feet 

 long, which may have originated during the melting of this glacier, and 

 is thus one of its evidences. On reaching Grant's (Breck, on map) the 

 present road ceases, but the valley might be followed further to the 

 north-west. Here are striae quite varied in direction. The face of the. 

 rock is smoothed in the direction of the valley a trifle west of south, 

 crossed by faint irregular lines S. 33° and S. 83° E. These would be 

 explained by calling the smoothing the direction of the ice down the 

 valley, and the striae caused by a local tributary sliding from the western 

 flank. The top of the ledge, where there is freedom from local currents, 

 displays the course S. 44° E., the normal direction of the ancient drift, 

 pointing nearly to Mt. Washington. The Wildcat shows other interest- 

 ing phenomena of local action further north, but I have not been able 

 to examine them. I will add' notices of them from Nowell and Sweetser. 

 The slide described by the first properly belongs to one of the tributaries 

 of the Peabody river glacier. 



W. G. Nowell has given estimates of the position and dimensions of a slide upon the 

 west side of Carter Dome, Vol. I, Appalachia, p. 83. I condense his account. The 

 date was the same with that described upon the west side of Tripyramid. Mr. Thomp- 

 son, the proprietor of the Glen house, lost his life in this freshet, while managing 

 affairs at his saw-mill. The top of the " hopper," where the sliding commenced, is 

 1200 metres from the summit. It descended N.N. W. 300 metres, dropping no me- 

 tres ; then fell 140 metres in a course of 400 metres due north ; next moved 500 metres 

 W. N. W., descending no metres, and continues only 100 metres further. For the 

 principal part of the last 700 metres the ledge is perfectly bare from 30 to 60 metres in 

 breadth, and has piled up at its base about twenty square acres of rubbish that had 



