356 Infinite Divisibrlity of Finite Matter. 
for the introduction of rocks or localities which do not belong 
to the district which is described. In this way unity is not 
preserved, and the continuity of the description is much inter- 
rupted We do not object to this in that part of the work, 
entitled, “ General Descriptions of North American Rocks,” 
though some have said that these can hardly belong, in a gen- 
eral view, to the district of the canal. But in the “ Description 
of rocks in the vicinity of the Erie Canal,” p. 47, the fault 
ofien occurs. We mention the account of the hornblende 
rocks near West-Point, p. 54; of granular quartz, pp. 56, 73 
of granular limestone, pp. 57, 8; and many others, which are 
not found near the line of the canal. 
If the work should pass to a second edition, which is highly 
probable, and even rendered somewhat necessary to make it 
as complete as the subsequent examinations of Professor Ea- 
ton enable him to do, and as the light thrown on the subject 
of the newer formations by the very able work of Conybeare 
& Phillips on the geology of England and Wales seems to re- 
quire, we would suggest as an improvement of the work, that 
the notices of rocks which are not found along the line of the 
canal, be omitted in this part of the work, or be reduced to 
the bare remark, that they do not occur in the district, and 
that the remarks and localities of rocks, in other parts of the 
country, be taken from the text, and put into the form oj 
notes. In this way the continuity of the geological deserip- 
tion of the country along the canal will be unbroken. W< 
think no one can read the work without being sensible of its 
interest and importance, to every one who examines the 
rocks of this district. The localities are given with muct 
precision, and the traveller is enabled at once to ascertain 
the rocks intended by the names which Professor E. has 
given them. It were to be wished that the common nomen- 
clature of the rocks had been altered with a more sparing 
hand. C. D. 
a - 
is 
Ant. XXIV.— On the Infinite Divisibitity of a Finite Quan- 
tity of Matter. By Sutuvon Crank, Esq. of Oxford, Ct. 
UTH is always consistent with itself. Any atc 
which involves an impossibility cannot be true. Says one, I 
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