THE KEITH, BEISBANE, AND NEILL PEIZES. 



The above Prizes will be awarded by the Council in the following manner : — 



I. KEITH PRIZE, 



The Keith Prize, consisting of a Gold Medal and from £40 to £50 in Money, 

 will be awarded in the Session 1867-68, for the " best communication on a 

 scientific subject, communicated, in the first instance, to the Royal Society dur- 

 ing the Sessions 1865-66 and 1866-67." Preference will be given to a paper 

 containing a discovery. 



II. MAKDOUGALL BRISBANE PRIZE. 



This Prize is to be awarded biennially by the Council of the Royal Society of 

 Edinburgh to such person, for such purposes, for such objects, and in such manner 

 as shall appear to them the most conducive to the promotion of the interests of 

 science ; with the proviso that the Council shall not be compelled to award the 

 Prize unless there shall be some individual engaged in scientific pursuit, or some 

 paper written on a scientific subject, or some discovery in science made during 

 the biennial period, of sufficient merit or importance in the opinion of the Council 

 to be entitled to the Prize. 



1. The Prize, consisting of a Gold Medal and a sum of Money, will be awarded 

 at the commencement of the Session 1868-69, for an Essay or Paper having 

 reference to any branch of scientific inquiry, whether Material or Mental. 



2. Competing Essays to be addressed to the Secretary of the Society, and 

 transmitted not later than 1st June 1868. 



3. The competition is open to all men of science. 



4. The Essays may be either anonymous or otherwise. In the former case, 

 they must be distinguished by mottoes, with corresponding sealed billets super- 

 scribed with the same motto, and containing the name of the Author. 



VOL. XXIV. PART III. b 



