Personal and Scientific News. yi'j 
there is a marked delta forming a cone of dejection. At Ontario, forty 
miles east of Los Angeles, the delta at the end of the canyon, has a rise 
of 6oo feet from the bottom of the valley to the mouth of the canyon, a 
distance of between five and six miles. The grade is much steeper 
near the canyon, and the material coarser and more angular. These 
deposits at first sight might lead one to think that they were of glacial 
origin, for in many respects they resemble such. However, a general 
view shows them to be too even in their topography. 
Within the canyon boulders five and six feet in diameter scattered 
in the bed of the stream show the marvelous transporting power of the 
apparently insignificant stream when swollen by sudden showers which 
visit these mountains. 
On ascending the canyon, the great talus slopes and the depth of 
weathering in the rocks (for solid surfaces seldom appear) give evidence 
that the lower part of the mountains has not been scoured by moving 
ice in recent geological time. These frost-cracked and deeply weath- 
ered crystalline rocks continue to the very sumtnit. There is nowhere 
the slightest sign of ice action. All the semi-angular poorly sorted ma- 
terial at the mouths of these canyons was carried and deposited there 
by these ordinarily small streams, whose transporting power during 
floods, when pent up in the canyon, is enormous. Just beyond the 
mouth of the canyon, the flood spreads out and drops its load in the 
form of a delta cone. 
At Sea, March 16, igoo. Fred B. Wright. 
PERSONAL AND SCIENTIFIC NEWS. 
Hayden river and lake, recently described by Prof. Geo. 
H. Stone, in the Colorado Springs Gazette, lies east, of the 
extinct Florissant lake, and in the opinion of professor Stone 
was somewhat earlier, having an outlet toward the east. 
University of Chicago. Mr. Stuart Weller, associate 
in paleontologic geolog}- has been promoted to an instruc- 
torship, and Mr. W. F. E. Gurley has been appointed to an 
associate curatorship in paleontolog}'. 
T. C. Hopkins, formerly of State College, Pa., re- 
ceived the doctor's degree in geology and petrology at the 
April convocation of the University of Chicago, His thesis 
is on "The Genesis of Certain Limonite Ores in Penns\'l- 
vania. 
Geological Society OF Washington. The program for 
the meeting on April ii was as follows: "River terraces 
in Southwestern Colorado," Arthur C. Spencer; "Physio- 
graphic development of the Black hills", N. H. Darton; 
