Personal and Scientific News. * 129 
the slight clayey deposit on the surface so much like englacial till, al- 
ready referred to, as occurring at Easthampton; and this may be the 
finer top soil mentioned by professor Le Conte as being left in spots on 
the Olympian mounds. 
Prom the description of the latter, by Mr. Rogers, I am almost cer- 
tain that they are the same in origin as the drift hills of Easthampton, 
and if the true explanation is found for one, it will solve the problem 
of the other. There is little doubt but that the same phenomena exist 
along the whole southern front of the ice-sheet, although there may be 
sections seemingly altogether different in character. I know it is so on 
Long Island. The Shinnecock hills, for instance, are really marginal 
kames without any terminal moraine proper, such as we find on the 
west end of the island, while across the Hempstead plains there is noth- 
ing but a fringe of boulders to mark the southern limit of the ice-sheet. 
Therefore, the terminal moraine has been represented as passing 
near Roslyn while in fact, it is, or should be, several miles in advance of 
this point. All this diversified condition of things is due to the action 
of the old subglacial streams, and the quality of the drift. These phe- 
nomena, no matter how diversified, are all subject to the same law and 
there is nothing like chance or confusion about them when properly 
understood. Mr. Rogers says that the Olympian mounds are without 
order; Chamberlain and Salisbury also speak of the drift ridges as de- 
fying all laws of symmetry and orderly arrangement,* but I cannot 
think so, if they are in any way related to the drift formations of Long 
Island. John Bryson. 
Eastport, L. I., June 20, 1893. 
PERSONAL AND SCIENTIFIC NEWS. 
Mr. E. H. Lonsdale, lately of the Missouri geological 
survey, has transferred his field of operations to Iowa, where 
he is now* assisting in the work of the geological survey of 
that state. 
Mr. H. F. Bain, for two years past student at the Johns 
Hopkins university, is now assisting in the work on Iowa 
coals, in connection with the state geological survey. 
In the early autumn, the Missouri geological survey will 
issue its first volume on the Palaeontology of the state It is 
by Dr. Charles R. Keyes. There are six hundred pages of 
text, about sixty plates, including several hundred figures, and 
a large colored geological map of the state, besides other 
illustrations. 
The report of the Lead and Zinc deposits of Missouri, 
by Mr. Arthur Winslow, state geologist, and James I). Robert- 
* The Driftless Area, Chap. 3. p. 261, Sixth Annual Report, U. 8. QeoL Survey. 
