Geology and Mineralogy. 157 
north to prevent northern drainage. The same obstruction [the 
ice] mu Snare existed in the Red River Valley, and, in the 
a we i pham, és attraction was sufficient to move the 
8 of the cocter toward itse elf, and to cause an aooendag’ te 
the squares of its distance from different parts of the lake, would 
thus cause a more rapid ascent in those portions of the shore line 
near it than in those more remote.” But the barrier of ice, even 
if 2,000 feet thick, would have pee eS in mass s to less 
ow ve been the fact. While such conditions (the surface 
being still leet, ile nothing the southward flow, ake 
deeper water near the barrier, and om nee would increase peat bea 
dency of flow northward beneath the 
4, Geologioat Saree of Penneyeanian —This fhesork ‘of sp 
Board of Commissioners to the Legislature, dated Jan. 1, 1883, 
states that ths) prey of the State, both geological and topo- 
graphical, is mostly completed, only a few areas remaining, the 
study of which will occupy the year 1883. The work has gone 
forward with great energy under the direction of Professor Lesley, 
epor 
on the work of each year, all of which have been carefully pre- 
pared, and are essentially final Reports. The chief work remain- 
ing is the special underground as well as above-gr ound survey of 
the Anthracite region, which has been in progress for eighteen 
months. As the object of the Anthracite survey is to make an 
associated rooks, with t hat completeness of aie i i detail 
amount MONA a for three more years is Pa vaee idaked for 
from the. Legislature 
ian Plants oF sor ae =an. the red-beds of South 
of ate scales, seeds and leaves By Contes a stem of a i- 
dodendron and Bae of Ferns. Profess Lesquereux, to 
whom the specimens were sent by Professor ya r (which er 
partly of his collection but in part from the Museum o 
parative Zoology), has examined the plants and found that 
among the species there are the following which are prise 
of the Permian: Ulimania frumentaria BOR. inoides 
Gee os mibdhcb Gopp., Walehia a iform Ww. tong gee 
