*Not ileterinineil. 



Preparation of Fertilizers. 



The special fertilizer mixtures used in the case of the different 

 plats were prepared from the above stated materials at the Mass. 

 Experiment Station at Amherst, Mass. 



They were selected in each case, as far as desired with reference 

 to different forms of potash, of nitrogen and of phosphoric acid to 

 study their influence on quantity and in particular on the quality of 

 the tobacco crop raised under otherwise fairly corresponding condi- 

 tions. 



Plat 1. 



