120 si Scientific Intelligence. 
‘The remarkable analogy of distribution of the coal strata, as indi- 
cated by these Saab is thus put in evidence, and cannot be ascribed 
to any ideal system. The order of superposition of the different sections 
is established on lithological and palzontological characters. But it is 
ly by palzontology that the equivalency of the coal strata has been, 
anid can be, established in distant parts of the same basin, and especially 
in separate coal fields. Therefore paleontology, as applied to the identi- 
fication of coal beds, can no longer be considered as a chimerical notion. 
Its practical advantage is at once evident. And I ite no doubt that, 
n as it is generally reecived as a guide in the examination of our 
coal fields, the harmony of distribution of the coal strata will become 
more and more striking. 
this progression of thickness is continued. It was imposible to get reli- 
able data on the “distribution of the coal in that country. From what 
have seen myself, many years ago, and especially from sections on Coal 
river, kindly communicated y Dr. I. H. Salisbury, it appears that coal 
basins of the ranmaste Pal fields. The disturbances of the strata are 
so marked in in rable flexures that dynamical geology has failed, 
thus far, to give a ee touching the general distribution of the 
veins. From paleontological evidence I am satisfied that the highest 
coal of the Pottsville and Tamaqua basin is the equivalent of our No. 4, 
and that the measures do not ascend higher in that part of Penang 
It is certain also that the big or mammoth vein, so generally worked in 
the same basin, is the equivalent of No. 1B. 
‘The Ist section represents the distribution of the coal strata in Union 
county, Kentucky, and is perfectly correct. < was made by Dr. D. Dale 
Owen, from borings and repeated measuremen 
‘Section 2d is the record of the Holloway Boviti at Henderson, and is 
also perfectly reliable for the place of the coal strata in this part of Ken- 
tu 
ucky. 
‘Section 3d is from Mr. J, P. Lesley’s Manual of Coal. It 
eas from such numerous and authentic records as the best geologist 
can 0 
, Section 4th is another general section of Pennsylvania copied from the 
final geological report of the State of cher Aaa In comparing these 
four general sections, it becomes evident that the essential strata, Viz? 
coal 1B, C 4th, and © 11th, come under the same horizon. er f 
ference in the intarinedines te strata is not of material hiiposhasides 
section of the Pennsylvania survey there is a distance of 480 feet pane 
as barren of coal, contradictory to local sections of the same Report, which 
ie 
