[J.J. DREDGE, V. (Belgravia), and many other correspondents,
have also kindly replied to this Query.]
_Dulcarnon_ (Vol. i., p. 254.)--_Urry_ says nothing, but quotes
_Speght_, and _Skene_, and _Selden_.
"_Dulcarnon_," says Speght, "is a proposition in _Euclid_ (lib. i.
theor. 33. prop. 47.), which was found out by Pythagoras after a whole
years' study, and much beating of his brain; in thankfulness whereof he
sacrificed an ox to the gods, which sacrifice he called Dulcarnon."
_Neckam_ derived it from _Dulia quasi sacrificium_ and _carnis_.
_Skene_ justly observes that the triumph itself cannot be the point; but
the word might get associated with the problem, either considered before
its solution, puzzling to _Pythagoras_, or the demonstration, still
difficult to us,--a Pons Asinorum, like the 5th proposition.