218 rApril 20, 
Claypole. } 
tween the cakes. To-day (Aug. 22) I was called to look at some of the 
results, and Isénd you a rough drawing of one of the germinated rye 
seeds. You will notice that the roots pushed out laterally between two 
blocks of ice; the shoot, or stem, did the same for half an inch, but then 
turned upwards at a right-angle and penetrated the solid ice vertically for 
a distance of two inches, 
‘‘No matter how the seed‘lay, whether with its germinating point up, 
down or sideways, the growth was always in the true vertical through the 
solid ice. 
‘“‘T have seen, in 1882 and 1883, at least fifty similar cases occurring in 
this ice-house.”’ 
Pending nominations, Nos. 985 to 1004, and new nomina- 
tions, Nos. 1005, 1006, were read. 
The President reported that he had received, and paid over 
to the Treasurer, $132.75, being the interest on the Michaux 
rentes, last due. 
And the meeting was adjourned. 
The Perry Oounty Fault. Note on an important Correction in the Geo- 
logical Map of Pennsyloania. By H. W. Claypotle. 
A I y' y YI 
(Read before the American Philosophical Society, April 20, 1883.) 
Tar DISTRICT IMMEDIATELY SoutH or New BLOOMFIELD. 
The country lying immediately south of Mahanoy ridge, is one of 
the best collecting grounds that I have found in the county for the fossils 
of the Hamilton and Chemung groups. The Upper Hamilton shales are 
there exposed better than I have found them elsewhere, and the Chemung, 
especially the lower part of the group, may also be examined in many 
small wayside cuts and field-exposures. 
3ut very soon after beginning to work this field. I became aware that 
some difficulty hitherto unrecognized stood in the way of deciding the 
horizon from which the fossils came. It was impossible to recognize the 
different rocks according to the views expressed in the preliminary map of 
Perry county. References to this geological map of the county will show 
that the ground between Mahanoy ridge and Dick’s hill is there repre- 
sented asa close syncline bounded by outcropping edges of Hamilton 
sandstone, the middle of which is occupied by a sheet of Chemung rocks. 
But a very short examination sufficed to show that the Hanhilton Upper 
shales extended much farther out into the valley from Mahanoy ridge 
