g5 Trench National tnjlituie. 



claim in the public fitting of Germinal (beginning of April) 

 following, the piece which fhall have gained the prize. 



Second Prize. To determine by a great number of ob- 

 fervations, the beft and the moil modern which can be pro- 

 cured, the epochs of the longitude of the apogeum or node 

 of the moon. 



Thefe obfervations mull be at lead five hundred in 

 number. 



The prize is a gold medal of the value of a kilogramme. 

 The learned of all nations are invited to this competition, 

 and they may write in any language whatever. 



The works will not b; received till the lafl day of Frimaire, 

 8th year, (December 21, 1799.) 



The Inftitutc will proclaim the piece which fhall have 

 gamed the prize, in its public fitting of the 15th of Germi- 

 nal following (April 4th, 1800). 



Third Prize. To point out the earthy fubftances and 

 procenes proper for manufacturing earthen ware, capable of 

 Handing fudden tranfitions from heat to cold, and fo cheap 

 as to be within the reach of every clafs of citizens. 



This art is fiill far from beino- carried to that decree of 

 improvement fo defirable for the public benefit, while fomc 

 neighbouring nations who do not make porcelain, manufac- 

 ture earthen-ware exceedingly ufeful, and fuperior to that 

 made in France. The Inftitute requefts the competitors to 

 examine the compofition of the beft earthen-ware; the quality 

 of thofe natural earths which may fcrve to form it, or that of 

 the artificial mixtures which might be fubftituted for it; the 

 manner in which thefe earths ought to be managed in order 

 to give them the necefiary properties ; the art of baking ; 

 the degree of heat; the form of the rcquifite furnaces ; and, 

 above all, the procenes proper for colouring and glazing 

 without the oxydes of pernicious metals. 



The competitors will remit to the Inftitute famples of the 

 earths employed in their potteries, and the earthen-wares 

 themfelves which have been manufactured in them. 



Thefe 



