Correspondence. 267 
more. Only the waters corresponding to the upper part of the series 
had egress by the Mohawk valley. The lower waters had to find an 
outlet by some other channel. The Mohawk outlet did not accomplish 
all that was needed, if it were the sole outlet of Iroquois water. 
2. A demand for corresponding shore lines on the outlet side of the 
Mohawk valley : As already clearly shown, beaches are often wanting. But 
the failure in recording them is no proof, for the region has not been 
sufficiently explored. The warping and erosion have so deformed the 
broken shore lines that the casual observer may not identify them. 
3. Tlie former expanded condition of the Mohawk river : This is favor- 
able to my hypothesis, but as the outlet of the Iroquois water, only the 
depth of a few feet above its floor corresponds to the upper stages of 
the Iroquois beach. Hence the objection is not well taken. 
4. The correspondence of deserted shore lines with other outlets : The 
higher beaches enclosed bodies which had more than one outlet ; and as 
we rise still higher, such bodies of water had egress by many outlets 
which it seems to me were straits. 
Can any one comprehend a river as large as the St. Lawrence flowing 
through an ice dam, from a lake held above sea by a glacier, after the 
waters had fallen just below the level of the Mohawk valley, without 
dissolving away the barrier? J. W. Spencer. 
Feb. 7th, 1891. 
The International Congress of Geologists. The usual circulars 
have been sent to all geological societies and prominent geologists in 
this and in foreign countries. It may happen that in spite of our en- 
deavors to reach all who are interested in the labors of the Congress, 
some circulars may not have reached the persons to whom they were ad- 
dressed, or some names may have been inadvertently omitted from our 
lis>ts that should have been included. May I request that you will 
kindly inform your readers that, if any geologist who maybe desirous of 
taking part in the Congress or of receiving its publications, which will 
probably include many valuable geological papers, will send his name to 
the Secretary (1330 "F" street, Washington, D. C.) it will be put upon 
the list and he will receive the invitation to become a member of the Con- 
gress. The small fee for membership is for this Congress only, and in- 
tended to defray the cost of printing and other necessary expenses. It 
is customary for geologists of the country where the Congress is held to 
subscribe even if they cannot be present at the Congress. 
S. F. Emmons, Sec'y and Act'g Treas. 
Washington, D. C.,Feb. 25, 1891. 
Important Results <>f The Texas Survey: A few notes in regard 
to the results of this survey during the past year may be of interest. 
In the eastern part of the state some thorough work has been done in 
mapping and studying the deposits of iron ores and the accompanying 
Tertiary ami Quaternary strata. The results give much light on the 
historical geology of these periods and develop the economic fad thai 
