C. E. Dutton—Hawaiian Volcanoes. 225 
summit, some of which resemble those of Mauna Kea, while 
is well known has been active in the early part of the present 
century. From 1801 to 1811 there were three distinct eee 
tions, separated by intervals of a very few years, but al 
them were small. ‘One of them, as nearly as can be made out, 
must have occurred about the year 1801, the second in 1805, 
and the last in 1810 or 1811. 
ohala Mountain, at the north end of the island, is about 
5400 feet in height, and its activity, no doubt, ceased at an 
earlier period than that of Mauna Kea. Its lavas are largely 
normal basalts, much of it approaching andesite in character. 
It appears to be notably less basic on the whole than the lavas 
of Mauna Kea. It has many cinder cones, some of them per- 
fectly well preserved, others showing conspicuous traces of 
ecay 
My visit to Maui, tsb briefer than that to Hawaii, was 
very interesting. The e great volcano Haleakala is about 10,400 
feet high. The great Raracei (so-called) at the summit pos- 
sesses a grandeur and impressiveness which have not been over- 
rated by travelers who have herewrore described it. The form 
true andesites, though in the main, the rocks are of a mildly 
basaltic type. 
I also went over the island of Oahu pretty estaba It 
has many points of interest, of which, perhaps, the most nota- 
ble are the studies of erosion which it presents. I sag pre 
the same remark a alr: the island of Kauai. It has fre- 
quently been noted t t the western islands of the group are 
the oldest and the pecs diminishes from northwest to see 
east. I consider the conclusion safe, however, only to this 
extent, that the eruptions in the western islands ceased ay 
earlier p period, though it does not necessarily follow that sng 
e arlier. 
here v7 fg abundant evidences of recent elevation in the 
