198 The American Geologist. ^^^h. i904. 
valleys; this point will be elaborated by professor Tarr, who intends 
to publish shortly on the drainage of this region. 
As to No. 3 : 
There is a« partially buried and deserted valley; its existence is a 
most obvious topographic feature to one in going northeast from Ithaca 
towards Freeville ; it is not a synclinal fold, nor the resultant of any 
other epeirogenic action ; it is due to stream action. 
As to No. 4: 
Professor Fairchild through an inadvertant misplacing of one quo- 
tation mark makes my acquaintance with the literature of glacial geology 
appear a little obsolete. I olfer no excuse, however, for referring 
the teachers of our schools to the classic work of Chamiberlin in the 
Third Annual report of the U. S. Gecl. Survey. frank carney. 
Ithaca, N. Y. 
Nodular Barite and Selenite Cryst.\ls of Montana. Much has 
been written concerning certain minerals and commercial ores of Mon- 
tana, especially those of gold, silver, and copper, but in many respects 
a virgin field remains. During the writer's summer geological survey 
trip for the State University many very choice crystals of selenite 
and several pounds of quite pure barite were collected. While this 
material is not in large enough quantities to be of economic value, it 
is nevertheless of scientific interest. 
The selenite crystals occur in the Haramie clays just below a small 
seam of lignite, and are as beautiful and perfect as thbse found in 
any locality. Selenite is found almost everywhere in the eastern half 
of Montana in the Upper Cretaceous formations, but. as far as the 
writer now knows, no other place in the state yields the crystals. 
These crystals are common 3^4 miles south of Wiboux, ;Montana, 
on the east bank of Beaver creek on the Homer Speyer's ranch. They 
are for the most part exposed in the little rain-eroded ditches lying 
on the surface. 
The length of the crystal-bearing clay is about 500 yards and in 
thickness about 10 feet. Many twins occur, and besides these four 
distinct forms are noted. Dana mentions in his mineralogy that selen- 
ite is "common in isolated crystals and masses, in Cretaceous clays 
in the western United States,"but does not give a specific locality. 
Several chemical analyses were made of this selenite and two of 
the results are given below : 
I. Analysis. 11. Analysis. 
H2O = 20.02 per cent. H:;0 = 20.08 per cent. 
CaO= 32.86 per cent. 010=32.86 per cent. 
SO3 = 46.95 per cent. SO3 =: 46.94 per cent. 
Total = 99.83 per cent. Total = 99.88 per cent. 
The barite found in the state is from several localities. The mas- 
sive is principally from the Ruby mountains, Madison county; the 
