68 ECONOMIC GEOLOGY OF AMITY QUADRANGLE, PA. 
obtained without cost by all drillers who desire them. The covers 
of these notebooks contain a few geologic notes and suggestions to 
drillers. The Survey is also glad to receive samples of formations 
passed through at various depths in the wells, as by careful study and 
comparison it is frequently possible for the geologists to make inter- 
pretations which the record alone will not give. 
RECORDS OF WELLS IN THE AMITY QUADRANGLE. 
For the convenience of persons prospecting and operating in this 
region the following table has been prepared, giving the depths to the 
principal oil and gas sands and other important beds penetrated by 
I he drill. The accuracy of these figures can not be vouched for, but 
they arc taken from the best available records furnished by the 
drillers. 
