jo6 '^^ Ut;hfya>"«- 



Series A, received so much magnesia in the form of 8 g. powdered 

 magnesit (<:o.5 m.m.) that the ratio was = . The bone 



dust was here the only source of lime. 

 Series B, contained the magnesia in the form of 078 g. crystallized sulphate 



which dose will be about agronomically equivalent in sand to 8 g. 



magnesit. 

 Series C, contained 3.42 g. lime-stone meal, every other particular=A ; 



hereby the ratio ————-= — ^ resulted. 

 •^ MgO I 



Series D, contained 6.84 g. limestone meal, every particular=A ; hereby the 



CaO 2 J J 



ratio ^, ^^ = was produced, 



MgO I ^ 



Series E, like A, but 11.76 g. gypsum were added, yielding thus the 



ratio - = -^^— : but one half of the lime is here more easily 



MgO I 



available than the other half. 



Series F, like A, but a certain portion of potassium sulphate was replaced 



by 0.4 g. K2CO3. Ammonium nitrate had here to be replaced by 



an equivalent amount of sodiuiri nitrate^^ in order to avoid the 



formation of the injurious ammonium carbonate. 



The following table will show the quantitative data in regard to 

 manuring conveniently : 



i). Seelhorst as well as Prianishnikow and Soderbaum have already observed that in the 

 presence of sodium nitrate the phosphoric acid of rocli and bone phosphate is not so easily available 

 as in the presence of ammonium sulphate or ammonium nitrate. In the former case, sodium carbonate 

 was believed to be gradually formed. 



