1^8 The Society of Arts and Sciences at Virecht. 



when feven Years of Age, after having been deprived of it 

 by Cataraols before he was a Yc;ir old ; with Reniavks. By 

 Mr. James VV^are, Surgeon. — 20. An Account of fome Gal- 

 vanic Combinations, formed by the Arrangement of fmgle 

 nietilUc Plates and Fluids, analogous to the new Galvanic 

 Apparatus of Mr. Volta. By Mr.llumphry Davy, Lcfturer 

 on Chemidrv in ihe Royal InRitution. — z\. A Continuation 

 of the Experiments and Obfervations on the Light which 

 is fpontaneoully emitted from various Bodies ; with lome 

 Experiments and Obfervations on Solar Light, when imbibed 

 by Canton's Phofphorus. By Natlianiel tlulnie, M. D. 

 F, R. S. and A. S. — 22. Experiments oh the chemical Pro- 

 duftion and Agency of Ele^lrieity. By William Hyde Wol- 

 ladon, M. D. F. R. S. — 23. Farther Obfervations on the 

 Eftefts which take Place from the Dcftruftion of the Mem- 

 brana Tvnipani of the Ear ; with an Account of an Operation 

 for the Removal of a partiuular Species of Deafnefs. By Mr. 

 Aftley Cooper. 



THE SOCIETY OF ARTS AND SCIENCES AT UTRECHT, 



This fociety has propofed the following 

 Fri-z-c Quejlions : 



ift, What is the real nature of the eleftrical matter ? Is it 

 compound, and of what principles is it compofed ? What 

 arc the chemical changes which it experiences by its union 

 with other bodies, and which it produces in thefe bodies ? 



The beft anfwer, to be tranfmitted before the ill of Oc- 

 tober 1803, will be entitled to a medal of the value of thirty 

 ducats. 



2d, The following, which has not yet been anfwered, is again 

 propofed : — What is the real nature of the dyfentery ? Is it 

 always the fame ? What are the different caufes of this dif- 

 eafe ? What are its fymptoms, and their confequenccs ? 

 What is the beft treatment, and method of cure ? and, in 

 pirticular, how far is the ufe of opium proper as a remedy? 

 The anfwer to be lent in before the i ft of October 1803. 



3d, A medal, of twenty ducats value, will be adjudged to 

 the author of the beft paper on natural hiftory, and a filvcr 

 medal to the next beft. 



The papers to be fent in before the ift of October 1802. 



4ih, VVhy arc the difcafes now prevalent in Holland not 

 fo fiuiple as formerly ? Is it owing to bilious, vifcous, or 

 other caufes ? By what means can it be afcertained with 

 molt certainty, in the commencement of thole difeafes, which 

 of the above caufes predominate ? W^hat is the beft method 

 ©f cure ? 



The 



