' Editorial Comment. 403 
very plainly seen, which, if one can correctly interpret, reveal 
others iDore clearly. And since it might not occur in a long 
time that any glacialist should see and associate together the 
phenomena which I have fortunatelj'' observed, since they lie 
widely scattered, and in another sense are a little outside the 
line of generally noticed phenomena of our northwestern drift, 
I have A^entured to write briefly of them. 
EDITORIAL COMMENT. 
The Close of the Twentieth Volume, 
The American Geologist, established January, 1888, com- 
pletes a record of ten years with the issue of this number. No 
previous ten years of American geology have witnessed more 
rapid progress, marked by more important events. In no pre- 
vious ten years has geological science spread over a wider scope 
or occupied more advanced positions in the activities of the 
day. Its ways and means of self-propagation are multiplied 
and the efforts of its agents are more effective than ever be- 
fore. With the spread of geological science, and perhaps be- 
cause of it, at least commensurate with it, has been a revival of 
everything that springs from a knowledge of the earth, and 
particularly of mining and mining schools, of geological sur- 
veys and geological literature. At the present time it isprob- 
abh" not rash to affirm that as many pages of geological liter- 
ature are disseminated in the United States in one year as 
were disseminated in ten years prior to the geological renais- 
sance. The dawn of tliis revival was due largely to Hayden 
and the survey that he established. It was brightened bj' 
Cook and by Wheeler, and was fully recognized when Powell 
energized the United States geological survey. This great 
central power has electrified and aroused into action the dor- 
mant geological possibilities of the nation and its example and 
its results have been influential in the remotest corners of the 
eartii. Moving slowly, like all great and powerful actors, it 
has accumulated momentum as time has passed, and its last 
ten years are its best. 
It is not possible to specify, at this time, any of the great 
direct results of this organization, but many of its indirect re- 
