484 > Scientific Intelligence. 
473, of the last volume of this Journal, the observation that 
glacial strie occurred on Locust Mountain, south of the glacier 
imit, is cited from remarks by Prof. Lesley in the geological 
report o . I. C. White. We learn from Prof. H. C. Lewis, 
that he has made a special examination of the region and finds 
that the supposed glacial striz are not of glacial origin. 
7. The Pre-Carboniferous — 
Strata in Arizona; by C. == 
D. Watcorr.—The follow- 
Carboniferous. 
Devonian. 
Tonto Group. 
of the Pre-Tonto groups == 
is shown. 
8. Notes on a new Topaz 
Locality ; by Rev. R. T. Eee 
Cross, Denver, Colorado. 22 
——In the October number & 
of the Journal for 1882, 2 
Messrs. C. W. Cross and 
Massive Tonto 
Lava beds. 
Chuar and Grand 
Cafion Groups. 
en good ones, and perhaps 
twice that number of phe- 
- nacites. 
ing the summer of 
1883, Mr. Walter B. Smith, Archean. 
for minerals in the foot- . 
hills twenty-five miles north of Pike’s Peak, a region largely 
destitute of ores and hence not much traversed by proepeme 
ors, when he found, near Platte Mountain, a “pocket ° 
topaz crystals. After digging more less for a month he 
c 
