action of powerful pressure upon the strata while the pebbles were in a 
soft condition from intense heat or other causes, Prof. Rogers urged the 
following objections : ' 
Ist. The effect of pressure upon a plastic solid, as shown by Sorby and 
deve | i 
yndal, is in all cases to develope mor more distinct cleavage planes 
throughout the mass, these planes being uniformly at right angles to the 
direction of the pressing force. Such an action applied on a large scale 
erate and of a similar fossil found subsequently by Mr. Easton in the con- 
glomerate of Newport shows that no such violence could possibly have 
operated on the mass. 
3d. While in the localities referred to the majority of the pebbles have 
the oblong shape and parallel arrangement above described, there are 
many scattered through t w a ve 
their longer dimensions more or less transverse or even perpendicular to 
s these c e 
all-pervading, softening action and pressure which the frenethakis aan es, 
their presence in these discordant conditions seems of itself a sufficient 
refutation of the theory. 
In regard to the curved form and close adaptation observed in some of 
the pebbles, Prof. Rogers thought that accidental peculiarities of shape in 
the original fragment and the effects of attrition and the close packing of 
the accumulated deposit furnished an adequate explanation both of the 
bent form sometimes met with and the accurate fitting of the contiguous 
glomerate rock, would not the argument founded om their shape and 
sition be even stronger than in the case of the Newport conglomerate ? 
vet nothing is more certain than that they owe their shape and arrange- 
ment to the peculiar movement and attrition to which they have been 
subjected by the action of the waves. 
Thus as regards the Newport rocks and most other conglomerates 
which had fallen under his notice, Prof. Rogers saw no difficulty in refer- 
