1 1 6 The Principles of Part III. 



mow, that the product is much of the fame 

 nature. Half an oz. of old lime wall, was 

 therefore faturated with the fpirit of nitre. 



Exp. 33. July 15, 1756, two pots were 

 filled with the fame earth as ufed in the 

 former experiment, and in the fame quan- 

 tity. Three grains of barley were fown in 

 each pot. N I. contained plain earth- 

 N 2. was watered with i dr. of the folu- 

 tion well diluted. 



July 25. N i. has three plants, one inch 

 in height. N 2. has one, the fame height. 



^ 19. N 2. has only onej but that 

 is of a deeper green than any in N i. 

 Added to N 2. the fame quantity of mix- 

 ture as before. 



Sept. 26. N 2. of a deeper green, has 

 more after-moots, and a longer ear than 

 any in N i. 



Cor. 



