444 



Mr. Griffin on the Constitution of 



3. The proposition evidently holds when the solid is a te- 

 trahedron, or has 4 corners, the smallest possible number. 



Thus let A B D G be the solid. 

 By supposition, c=4, 



it is evident that /=4, 



and e — 6. 



Now 4 + 4 = 8 = 6 + 2, 



or c +/=<? + 2. n ' 



4. The proposition being true when c=4, it must be true, 

 as above demonstrated, when c = 5. 



In the same manner, the proposition being true for 5 cor- 

 ners, must be true for 6. 



Being true for 6, it must be true for 7, and so on for any 

 number of corners. 



St. Andrews. 



LXIV. On the Constitution of Aqueous Solutions of Acids and 



Alkalies. By John Joseph Griffin, Esq. 



[Continued from p. 310.] 



Table X. — Anhydrous Potash. 



KO = 589*916 "grs. Temperature 62° F. 



