36 PROCEEDINGS OP MADISON MEETING. 



from each other ; hence the conclusion is drawn that the smoothing upon many 

 fragments of white quartz upon the higher summits is due to glaciation. The other 

 quartz-ledge showing glaciation is in the Adams-Jefferson col and is 25 by 30 feet 

 square, and is completely covered by delicate strise running S. 55° E. One could 

 not readily refer to a larger and handsomer area of glaciated white quartz at any 

 lower level away from the mountains. 



Every one of the cols in the Presidential range shows excellent examples of 

 roches moutonnees and usually striae and transported bowlders. The embossment in 

 the cols adjacent to Mount Adams and Mount Pleasant are uncommonly fine. 

 Those about the Lakes of the Clouds have been figured as good illustrations of ice 

 action in my father's reports and text-book. No geologist familiar with ice- work 

 can hesitate to recognize their glacial origin. 



Mount Madison presents near the top the appearance of smoothing and obscure 

 glacial marking, and a single pebble of green schist like that found in ledges in 

 the town of Stark has been brought to me. 



Mount Adams has changed its surface character somewhat since my first visit 

 there twenty- two years ago. It was said then that " fragments are strewn univer- 

 sally over the cone. You can find one comparatively small block standing above 

 every other one at the very apex." I now find that the loose fragments at the apex 

 have been pushed downhill by tourists and engineers, so small is the summit ; 

 consequently glaciation is not visible ; but a few feet lower down, on the north 

 side, I found a rounded bowlder of granite of the size of one's fist comparable with 

 the rock in Stark, and on two sides of the mountain, at levels from 100 to 300 feet ^ 

 below the apex, I found several blocks of hornblende and green schistose rocks 

 such as are common about Groveton and Lancaster. Three-fourths of the way 

 from the top of Mount Adams to the west base of the cone I found a protogene 

 bowlder weighing 25 pounds. My notes also mention an apparently embossed 

 ledge of rock quite near the summit of Adams, on the west side. Mr W. G. Nowell 

 observed on the west side striae at the altitude of 5,500 feet, and also on Mount 

 Sam. Adams, 5,583 feet, with the direction S. 58° E. 



Mount Jefferson is abundantly. covered by transported stones, chiefly of proto- 

 gene gneiss. On both the north and south flanks they are very noticeable and 

 may be counted by the hundred. At the apex I saw one weighing 20 pounds. 

 Two hundred and fifty feet below the summit, on the southwest side, I found near 

 each other obscurely embossed ledges, smoothed fragments of quartz, apparently 

 glaciated when in the ledges, and three bowlders, each estimated to weigh two 

 tons. On the summit of Mount Clay there are obscure embossed ledges, and I 

 picked up a small pebble of slate such as is common in Essex county, Vermont. 



I wil simply say that on Mount Washington I have found many bowlders of 

 protogene and other foreign stones on its northwestern slope and apex. The best 

 example is a rounded bowlder of protogene weighing 91 pounds, found about 15 

 feet from the southeast angle of the Tiptop house, and presented to the Boston 

 Society of Natural History. A supposed scoring measured S. 4']° E. on a rock plat- 

 form near the Signal Service station. Professor W. O. Crosby has verified the 

 observations of transported bowlders on the summit of Mount Washington. At 

 the Lakes of the Clouds the striae point S. 22^ E. and S. 52° E. Two hundred feet. 

 above these lakes the course is S. 30° E. In the Mount Pleasant cols the course is 

 S. 30° E. ; on Mount Clinton from S. 47° to 52° E. ; on the south peak of Clinton 

 S, 50° E. ; on the top of Mount Webster S. 30° E., and farther south on a surface 



