408 Screntific In telligence. 
2 
materials, and a vast increase in showers of ashes, and outflows 
of volcanic mud. 
e limited amount of examination I have myself given the 
summit line of the Cascade Range hardly entitles me to state how 
far the interval between Mt. Hood and Mt. Shasta is covered 
with eruptive rocks. But if I should judge from the materials 
he roc 
vents, and not even half of these. Many older vents have been 
covered up. 
Valley. Around Mt. Adams it is almost entirely absent. It 
ash, upon the eastern slope of the Cascade Mountains, is enormous, 
and helps conceal from the observer the rocks below. It has in it 
nt to prevent its subsequent drifting. 
the U. 8. Geological and Geographical Sur- 
F H 
v 
charge.) Vol. V, 
Bulletin contains the following papers: on the Coatis, by J-. A. 
ALLEN ; on the pr t state ot Passer domesticus in America, 
ia Iment of American Ornithological Bibliography, 
ours, U.S. A.; on the Laramie Group of Weste 
BiVis, 
