Bat avian Society of Sciences, Haarlem, 3^9 



3. They have received upon the question, — " Whg.t is 

 at present known of the causes which occasion the coirup- 

 tion of stagnant water ? and are we able to discover, from 

 the knowledge we possess upon this subject, or from any 

 thing that can be proved by decisive experiments, the most 

 effectual, and at the same time innocent, means of prevent- 

 ing the corruption of stagnant water ?" two memon-s ; the 

 one in Dutch, having for motto, Neque vero negligenfiam, 

 Sec. Hipp.; the other in French, having as motto, Magi/am 

 artis partem, &c. Hipp. They have determineci to repeat 

 the question. The answer to be given in before the 1st of 

 November 1S06. 



4. They have received upon tlie question, — '* Wliat light 

 has the new chemistry thrown upon the physiology of the 

 human body ?" a memoir in Dutch, having for motto, 

 Fita Irevis, ars longa, &c.; which was judged too super- 

 ficial to receive the prize. 



They have received also upon this qucstion_, and upon 

 the two following : 



5. " How far has the light thrown by the new chemistry 

 upon the physiology of the human body contributed to im- 

 prove the knowledge of certain diseases ? and what useful 

 consequences, in any degree confirmed bv experience, can 

 we deduce from it in the practice of medicine ?" 



6. " How far has the new chemistry tended to furnish 

 precise notions with regard to the actions of certain external 

 and internal remedies which have been either long in use or 

 revived anew ? and what advantages can we derive from a 

 more exact knowledge of these actions in the treatment of 

 certain diseases >" menioirs in French, having for motto, 

 E,st modus in rebus. 



The society have determined to propose the following 

 questions: candidates to deliver their answers by the 1st of 

 November 1 806 : 



''1. How far has chemistry explained the principles or 

 component elements of plants, and more especially of such 

 as furnish food ? and what conclusions can we draw, cither 

 from the knowledge which we already possess upon this 

 subject, or from what we can discover by experiment, aided 

 by our knowledge of physiology, with regard to the vege- 

 tables which are best suited to the support of the human 

 body both in health and in some diseases r" 



" 2. Are we enabled, by our present knowledge of 

 the elements composing the food of animals, to explain 

 satisfactorily the origin of the several principles or consti- 

 tuent parts of the human body ; as for example, of the cal- 



Vol. 23. No. 92. Jan, isoQ. A a c»reous 



