in regard to Earthy Matters. 169 



sulphur, and the omission of those which the preceding year had 

 remained in a garden. The four boxes employed being placed 

 in a greenhouse under cover, 300 grains of barley were sown in 

 each of them, and they were severally moistened, as they seemed 

 to require, with distilled water, containing in every ten gallons 

 two ounces of nitrate of strontian. The plants were treated in 

 the same manner as on the preceding year, though, it is to be 

 remarked, they did not thrive equally well. They were not cut 

 down until the whole of the water had been expended upon 

 them ; so that we may calculate about half an ounce of nitrate 

 of strontian to have been applied to the roots of each. 

 The following is a tabular view of the results obtained : 









% 



73 



s 



Soluble portion of these ashes : 



a 



Subject of the 

 Experiment. 





Where planted. 



U 



o 



Xi . 



G5 





In nitric acid. 



isolub 

 strua, 





Weight oi 

 plai 



Weight ol 



In water. 



Without 

 previous 

 treatment. 



After being acted on 

 by an alkaline car- 

 bonate. 



Portion ir 

 these men 



Barley (Hor- } 



deum vulga- > 

 re\ 300 grs. ) 







7-7 



1.53 



1.68 



Earthy 

 phosphate. 



Earthy 

 sulphate. 



.45 



2.04 







N.B. Con- 

 sisting en- 

 tirely of 

 phosphate. 









In a Green- 

 house. 

















300 grs. of 

 ditto. 



{ 



Soil. 

 Sulphate of) 

 strontian. J 



383 



61 



13.3 



17.0* 



3.6 



1.3 



0.9 



Ditto. 



i 



Carrara ) 

 marble. J 



230 



34 



7-8 



14.5 





2 5 



0.8 







Ditto. 



{ 



Washed ) 

 sea-sand. J 



260 



45 



10.5 



5.9 



0.9 



2.5 



2.1 



Ditto. 



{ 



Flowers of \ 

 sulphur. J 



78 



7 



0.9 



4.0 



none. 



none. 



0.1 



At the same time at which the above four samples had been 

 planted, 100 grains of barley were sown in flowers of sulphur, 

 and moistened only with distilled water. This latter yielded 



* These salts for the most. part consisted of nitrates of lime derived from 

 the action of nitric acid upon the earthy carbonate, of which the greater part 

 consisted. 



