300 M. Delpon on the Bones of various Animals 
to arrive at the rank of a science, chemistry cannot be of any as- 
sistance to it, and the objects are determined by mineralogical 
inquiry for the science of chemistry, and not inversely, which is 
likewise the case with all other sciences. The proposition, that 
two sciences mutually presuppose each other, in its perfect ge- 
nerality, has no meaning whatever ; for it is true only if the two 
sciences coalesce into a single one. It is even true of propositions 
within the same science. We not unfrequently meet with such 
opinions on the relation of natural history to other sciences the 
only thing that can be said to their advantage is, that they ren- 
der all refutation superfluous. 
Art. X. — Account of the Bones of various Animals discovered 
at Breingues , in the Department Du Lot. By M. Delpon. 
This discovery has been mentioned by M. Cuvier in the 
Analysis of the labours of the Royal Academy of Science during 
the year 1818. Some of the bones in question have been depo- 
sited in the Museum at the Jardin du Roi, and M. Cuvier has 
taken notice of them in his great work ; but we have judged it 
useful to present an extract of the inedited notice of M. Delpon, 
because it exhibits several very curious facts, especially the very 
singular order in which these bones have been found. 
In various points of the calcareous portion of Quercy, there 
are seen remains of a sort of entrenchment, formed of blocks of 
stone, of more or less considerable dimensions, and which de- 
scribe straight lines or circular inclosures. The most remark- 
able of these inclosures occupy the summit of two mountains 
of the Commun de Breingues, in the Circle ( arrondissement ) 
of Figeac, of which the one is situate on the right bank 
of the Sele, and the other on the left. There are observed in 
the rocks of the right bank several cavities or grottoes, before 
which some vestiges of buildings are seen, — a circumstance 
which presents itself in the greater number of the grottoes with 
which the rocks along the Lot, the Sele, &c. are perforated. 
Popular traditions have occasioned several diggings to be made 
in these grottoes, with the view of discovering treasures supposed 
to be concealed in them. In 1816, the whole population of 
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