366 The American Geologist. December, issf 
The Methow Glacier. In the article by Mr. Dawson, re- 
ferred to above, it is stated that formerly three glaciers flowed 
eastward from the Cascade mountains and reached the 
Columbia; these ice streams "swept down the Chelan, Methow 
and Okanogan valleys, respectively." The evidence in refer- 
ence to the Chelan and Okanogan glaciers, as is well known, 
fully confirms a portion of this statement, but, as to the 
Methow glacier, I wish to say that I followed the Methow 
river during my reconnoissance of last summer, from near its 
source at the crest of the Cascade mountains to its junction 
with the Columbia, and found abundant evidence of the 
former presence of glacial ice from the source of the river to 
Winthrup. At Winthrup the river receives an important 
tributary from the north, and its valley broadens. The 
former glacier expanded in this broader portion of the valley 
and reached some four or five miles south of Winthrup and 
deposited a fine group of kames with undrained basins be- 
tween, some of which still hold lakelets. From the locality 
just mentioned to the mouth of the river I failed to find any 
evidence of the former presence of a glacier. The Methow 
glacier according to my observations did not reach within 
about 40 or 50 miles of the Columbia, and hence cannot be 
appealed to as having any connection with the origin of the 
coulee crossing the promontory on the east bank of the 
Columbia, opposite the mouth of the Methow. I refer to the 
so called "glacial channel" shown on Dawson's instructive 
diagram forming figure one, page 206, in the article under re- 
view. According to the explanation advanced by Mr. Daw- 
son, the Mfethow glacier dammed the Columbia, and caused 
the river to rise "to a hight sufficient to enable it to cut across 
the corner, where it excavated a deep transverse channel 
some 150 feet down into the granite." The transverse channel 
referred to attracted my attention last summer, while on the 
opposite or west side of the river, but I did not visit it. Some 
of its features, however, may be better studied from a distance 
than by close inspection, as I believe will be shown by my 
interpretation of it made in the field. I therefore transcribe 
the following passage from my note book: "The great 
terrace occurs on each side of the Columbia and extends far 
up its course above the mouth of the Methow. Just opposite 
