U. University Club, Dec. 4. 1850.
_Euclid and Aristotle._--The ordinary chronologies place Aristotle as
nearly a century anterior to Euclid; but Professor De Morgan ("Eucleides,"
in Dr. Smith's _Biographical Dictionary_) considers them as contemporary.
Any of your readers conversant with the subject will oblige me by saying
_which_ is right, and likewise _why_ so.