F>e?ich National Listitiitc. 279 



with a hard body, or even with the body of a quill ; rotten 

 wood, some kinds of fish, and ottier animal substances 

 which approach putrefaction, when in a dark place, Sec." 



The Class of Mathematical and Physical Sciences proposes 

 as the subject of a prize in physics, which it will adjudge 

 at the public meeting on the first Monday of January 1809, 

 the following question : 



" To establish, by experiments, what are the relations 

 which exist between the different modes of phosphorescence, 

 and to what cause is each kind owing ; excludnig the exa- 

 mination of the phaeuomena of this kind observed in living 

 animals." 



The prize for the best memoir upon this question is to be 

 a gold medal of the value of 3000 francs. 



The memoirs rnust be sent to the secretary of the Insti- 

 tute before the 1st of October 1808. 



The Class of Mathematical and Physical Sciences pro- 

 posed in the public meeting before last the following ques- 

 tion, which they once more lay before the public : 



*' To determine, ))y anatomical and chemical observations 

 and experiments, what are the phcenomena of the torpidity 

 which certain animals, such as monkeys, hedge-hogs, &c. 

 experience, during winter, with respect to the circulation of 

 the blood, rcspn-ation, and irritability : to ascertain what are 

 the causes of this sleep, and wherefore it is peculiar to these 

 animals." 



The memoirs on the above subject must be sent to the 

 secretary's department of the Institute before the 1st of Oc- 

 tober 1807. 



Conditions of t lie Competition for the above Prizes. 



Any person whatever may become a candidate for these 

 prizes ; members of the Institute alone excepted^ 



None of the works transmitted may bear the author's 

 name, but merely a sentence or device. A separate and 

 scaled note may be attached, which may contain the name 

 and address of the author, along with his device: this note 

 will not be opened unless the memoir accompanying it me- 

 rits the prize. 



S 4 Tbc 



