'i^'M On the Alkalies of Commerct, 



runs through the whole circle of our horizon in the space of 

 S9 years. 



There is also published & pamphlet entitled " New Dis- 

 covery of the Flux and Reflux of the Sea," the physical 

 cause of which is said to be the double movement of the 

 globe. A chimera of the Newtonian attraction. This may 

 suffice to show the absurdity of the work. 



The same author has also published a new discovery of 

 the quadrature of the circle, which shows that nothing can 

 be expected from his astronomv. 



There is likewise a book published called "Elements of the 

 Philosophy of the Heavens." 1 was very much deceived 

 1>y this title : I thought it was a book upon astronomy, but 

 it is upon devotional exercises. 



XXXIIl. On the Alhalies of Commerce, and on the least ex- 

 pensive Process for ascertaining their commercial f'alue by 

 Means of the Instrument called the Alkali-meter. ' Read 

 to the Academy if Rouen, 5 Thermidor, An. 13, by 

 M. Descroizilles senior. 



[Continued from p. 178.] 



Imdriability and Faciliiy of the yilkcdi-metrical Proofs. 



J\ GRAnuATiON like that which we have been describing 

 is truly natural and invariable ; there is nothing precarious 

 in it: in short, let us examine the operation we have de- 

 scribed. 



We have, on the one hand, put into solution one deca- 

 gramme, that is to say, ten o-rammes or 100 decigramme3 

 of potash ; nevertheless we have only taken definitively thu 

 moiety of this solution ; thus it is reduced to 100 half-tenths 

 of the granimes : on the other hand, we have put into the 

 alkali-meter 38 graumies, that is to say, 70' denii-grammes 

 of a liquor composed of one part in weight of sulphuric acid 

 and of nine similar parts of water : the Jti denii-grammes of 

 the test liquor therefore contain 76 dcmi-tenths of grammes 

 of effective acid ; and, if it required 55 demi-grammes of this 



liquor 



