3 70 Pharmaceutic Society of Parts. 



What arc the alterations which the above salt undergoes 



m D 



in the various vehicles employed to administer it in, and 

 particularly lemonade, orange-water, whey, Sec. &c. ? 



4. What is the difference between electuaries recently 

 prepared, and those which are several years old ? 



5. Which is the best method of preserving the various 

 parts of plants, in regard to their aroma, colour, the time of 

 gathering, their alterability, and the method of preserving 

 them from insects ? 



6. Endeavour to ascertain the natural families of the ve- 

 getables from their chemical properties ; i. e. determine the 

 principles which occasion the differences between them. 



7. Point out the best method of preparing distilled wa- 

 ters from aromatic plants, or such as are said to be inodor- 

 ous either in B. M. or in the open fire. ' 



Which of these waters ought to be prepared with plants 

 previously carefully dried ? — and is drying a good method of 

 preserving them a long time without alteration? 



9. Which are the extracts that ought to be prepared 

 from green, and which from dry plants, by maceration, in- 

 fusion, decoction, or evaporation? 



9. The products of the infusion or decoction of inodorous 

 substances not being the same, determine wherein the dif- 

 ference consists, compare the two methods of analysis upon 

 vegetable matters which do not contain volatile principles. 

 Thus, for instance, we know that an infusion of coffee dif- 

 fers very much from coffee a long time boiled ; we know 

 also, that meat-broth is more gelatinous when obtained 

 by slow ebullition than by a hasty boiling; lastly, we 

 know that the extracts of plants become partly insoluble by 

 means of the prolonged action of boiling water. Give the 

 theory of these phaenomena. 



The members of the Pharmaceutic Society themselves are 

 excluded from obtaining the above prizes; but every fo- 

 reigner whatever may write for them. 



The various essays must be transmitted on or before the 

 1st of December, 1806, to M. Bouillon Lagrange, secretary 

 to the society, at Pari;?. 



Each essay must have a motto or device, ahd must be 



accompani ed 



