Mr. Porkliis's Sleam-Engitie. 313 



and designation : and the same motto or device must be put on 

 the Dissertation, that the Society may know how to address 

 the successful Candidate. 



3. No paper in the hand-writing of the Author, or with his 

 name affixed, can be received ; and if the Author of any paper 

 shall discover himself to the Committee of Papers, or to any 

 Member thereof, such paper will be excluded from all compe- 

 tition for the Medal. 



4. The Prize Essay will be read before the Society, at the 

 Meeting preceding the Anniversary Meeting of the Society in 

 March 1824.. 



5. The Prize Medal will be presented to the successful Can- 

 didate, or his substitute, at the Anniversary Meeting of the 

 Society. 



6. All the Dissertations, the successful one excepted, will, 

 it desired, be returned with the sealed packets, unopened. 



One Dissertation only on the subject " Dropsy," proposed 

 by the Society for the Fothergillian Medal, to have been ad- 

 judged in March 1823, having been presented; the Society, 

 thinking it probable that from the recent establishment of the 

 Prize it had not been sufficiently made known to the Medical 

 Faculty, have deferred the adjudication of the Prize for the best 

 Dissertation on the subject of " Dropsy" to another Year. 



The subject of the Essay for the Gold Prize of the ensuing 

 Year is " Diseases of the Spine." 



ROYAL ACADEMY OF SCIENCES, PARIS. 



Dec. 2, 1 822. — The following memoirs were read : — On 

 Animal Heat, by M. Dulong. — On die use of Bronze in the 

 making of Medals, by M. Puymaurin, jun. — On the triple com- 

 pounds of Chlorine, by M. Despretz. 



Dec. 9. — M. Cuvier read a Note on the Rhinoceros of Africa, 

 lately described in the Philosophical Transactions ; and on the 

 I lead of a fossil Rhinoceros found near Montpellier. — M. Fres- 

 nel read a Memoir on the particular kind of Double Refrac- 

 tion which Light experiences as it traverses Rock Crystal in a 

 direction parallel to the Axis. 



Dec. 23. — M. Desmoulins read some Observations on the 

 connexion between the Strength of the Sight and the Extent 

 of Optic Nerves and the Retina. 



EX VI I. IntelligcJice and MisccUancuus Articles. 



MR. Perkins's steam-engine. 



1\J" R. PERKINS'S invention is founded on a most invaluable 



-*--*■ discovery — that water is capable ol' enduring an elevation 



of temperature even to a red boat, or perhaps an indefinite cx- 



\'ol. fJl. No. 300. -4y'/77l823. Rr tent, 



