io6 < Tbe Principles of Part III. 



Cor. 6. The vegetative effects of nitre 

 does not feem to have been increafed by 

 the addition of twice its quantity of oil 

 of olives. The oil of olives feems to have 

 fucceeded better with the addition of the 

 nitre than without it. The falts would at- 

 tenuate the oil, and help it to enter the 

 veffels of the plant more eafily. 



Cor. 7. Vitriolated tartan which is a 

 compofition of the acid of vitriol and an 

 alkaline fait, feems to promote vegetation 

 very ftrongly. A gentleman wanted to de- 

 ftroy fome rank grafs in his court, and was 

 advifed to iprinkle it with the oil of vitriol, 

 as the greateft enemy to vegetation. He did 

 fo 5 but, to his great furprife, the grafs came 

 up much flronger than before. 



Cor. 8. Sea-falt, in the proportion of 

 I oz. to 6 lb. of earth, appears to be an 

 enemy to vegetation. Moft farmers comr- 

 mend it as a good manure, though there 



are 



