Medical and Philosophical News

ri^HE Society of Natural Hiftorians at BerJL lin have propofed the following question for a prize of twenty ducats: l. " How " Jong is the virus producing hydrophobia ca" pable of remaining in an animal, and what is w the length of time required for communicat" ing it? 2. How long can this fame virus " remain in the body without manifefting itfelf ? " From the moment the difeafe is communi" cated, what are the moft efficacious means of " obviating its effe&s ?" The diflertations on this fubjed are to be written in French or Latin, and fent to M. Otho, fecretary to the Society at Berlin, on or before the 27 th of December 1781.