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red colour, whereas thofe I had at firft ufed were white. The 

 refuk varied ; as the red afhes produced the muriate of foda only, 

 but in much fmaller quantity than I had before procured of 

 Culphat of foda from the -white aihes, which was about one fixty- 

 fburth of the original weight. This appeared to me rather 

 interefting, as it may in fome degree account for the higher 

 efficacy of red afhes as a manure. I alfo find that fulphat of foda 

 has been already deteded in turf afhes. Vide Mem. Bruflels. 

 Voklll. 



S 2 



