'102 Tin American Geologist. September, i89i 
The American Association for the Advancement of Sci- 
ence, holding its meeting under the presidency of Dr. Daniel 
G. Brinton, in Brooklyn, N. Y., August 15th to the 22d, had an 
attendance of 477 members and associates; and 213 new mem- 
bers were elected. In Section E (Geology and Geography) 
the address of the vice president. Prof. Samuel Calvin, was on 
"The Niobrara Chalk," as presented in the foregoing pages. 
A list of the papers read before this section is as follows, with 
brief notes or abstracts which have been received for some of 
them. It is expected that several of the papers will be given 
in full in our future numbers. 
Water resources of the United States. .1. "\Y. Powell. The ultimate 
development of the vasl arid and subhumid regions in the western hall' 
of the United stales was shown to depend on the thorough utilization of 
the water resources for irrigation. A large part of tie- work of the 
United States ( leological Survey, under the author's direction, has been 
given to investigations of t he amount of available water supplies in these 
regions, and to the extent of their fluctuation, by which their value for 
agricull ure is determined. 
Tin National Dilantin. V. \{. Newell. 
Geographical development of China, Korea, and Japan. Gardiner <i. 
HlBBAIil). 
^•1 miniatwrt extinct volcano. \\ .1 McGee. 
A Paleozoic. eruption in Missouri. Artiiub Winslow. 
Tin Zinc mines at Franklin Furnaa and Ogdensburg, X..I. .1. F.Kemp. 
The historj of the mines was first sketched, with notes of their chief 
ores and minerals. The general geological questions involved in the re- 
gion followed, and the problems of the blue and white limestones and of 
the intruded granites were considered. The ore bodies were then de- 
scribed bj means of maps and sketches. The Ogdensburg one was 
shown to lie ;i steeply pitching syncline; and the Franklin Furnace one. 
a low pitching syncline with a collapsed anticline on the eastern limb. 
The ore bodies were not regarded as having ever been continuous, hut 
rather as each a local deposit along nearly the same geological horizon. 
The unique geological and mineralogical character of the deposits was 
commented mi. with references to somewhat similar deposits elsewhere. 
A. list of the minerals of these localities, sixty-five in all. was written 
on the blackboard; a series of specimens, illustrative of the paper, was 
exhibited; and hints were given regarding the proposed excursion to 
t hese mi nes. 
Notes on tin Atlantic Minn n . \V . 11. Dam,. An examination of the 
invertebrate Fossils of the strata at Gay Head, Martha's Vineyard, here- 
tofore regarded as Miocene, confirms their Mioceneage and allows them 
to he referred to the Upper Chesapeake formation, between the St. 
Mary's and Ybrktown horizons. A list of the species was included and 
two new forms described. Another horizon, unconformable with both 
the Miocene be low a ml the glacial drift above, afforded a few molluscan 
remains which indicate a Pliocene age for this bed. 
The phosphatic rockof the Ashlej river region, near Charleston. S. 
('.. is found to he of upper Miocene age. It has previously been called 
Eocene or Postpliocene. The phosphatization may have been in Plio- 
cene times or the late Miocene, This rock contains no Eocene types: 
and it was shown that the Eocene aye of the associated Ashley river 
marl bed rests upon very unsatisfactory evidence. It may also prove to 
t»e M iocene. 
