some of the Substances which accompany it , Sec. 341 
Exp. 6 . No precipitate took place from a mixture of barytes- 
water and strontia- water ; nor from solutions of the carbonates 
of those earths, in water impregnated with carbonic acid. 
Exp. 7. Guyton obtained a precipitate, by mixing solutions 
of muriate of lime and muriate of alumina. I could not obtain 
any, 
Exp. 8. Solutions of muriate of lime and muriate of magnesia, 
when mixed, did not afford a precipitate. 
Exp. 9. Muriate of barytes did not, as Guyton has asserted, 
form a precipitate with muriate of lime. He was right in saying, 
that muriate of strontia gave no precipitate with muriate of lime. 
Exp. 10. Muriate of magnesia and of alumina, afforded me 
no precipitate. Guyton says, that the liquors became milky. 
Exp. 11. Muriate of magnesia, whether mixed with muriate 
of barytes or of strontia, afforded me no change; although 
Guyton sa}'s he obtained an abundant precipitate, by mixing 
muriate of magnesia with muriate of barytes. 
Exp. 12. Muriate of alumina and of barytes, did not, when 
mixed together, yield any precipitate. Guyton asserts, that 
there is a precipitate in this case. 
Exp. 13. Muriate of barytes and of strontia, did not form a 
precipitate. Guyton has remarked the same. 
Exp. 14. From muriate of strontia and of alumina, I obtained 
no precipitate. With Guyton the liquor became milky. 
From all these experiments it appears very clearly, that 
Guyton has pronounced too hastily, upon the affinity which he 
supposes barytes to entertain for lime, for magnesia, and for 
alumina; and that he is equally in the wrong, with regard to 
the affinity of strontia and alumina. With regard to Exp 3, 4, 
and 5, although they appear to be true, yet it would require the 
mdcccii. Y y 
