Geology and Natural History. 515 
10 he same moment 
the second sensitive flame, ceasing to be affected, returned to its 
former tranquility.— ature, ix, 334. Bi GOP. 
é 
II. GeoLtocy anp Natura History. 
aC 
jl. On: Mountain Sculpture in the Sierra Nevada, and the 
~ethod of glacial erosion ; b . Carr.—After speaking of 
the divisional planes in the granites of the Sierra Nevada, Prof. 
the group. 
Domes of close-grained siliceous granite are admirably calculated 
to withstand the action of atmospheric au chanical forces 
© other rock-form can compare with it in strength; no other 
unable to force the mig 
time. 
e Star {ing group of domes is perhaps the most interesting 
of the Merc 1 basin. The beautiful conoid, Starr King, the loftiest 
and most p fect of the group, was one of the first to emerge from 
the Glacial sea. * —# x 
ere appear to be no positive limits to the extent of dome 
Structure in the granites of the Sierra, when considered in all its 
numerous modifications. Rudimentary domes exist everywhere, 
Waiting their development, to as great a depth as observation can 
reach, The western flank was formerly covered with slates, which 
have -vidently been carried off by glacial d tion from the 
Jour. Sci.—Tuirp Series, Vou. VII, No. 41.—Mar, 1874. 
26 
