85] 



Estimation of Nitrogen 



57 



Other permanent apparatus is shown in figs. 27, 28, 29, 

 and 30. 



The student should make himself thoroughly expert in those 

 for?ns of nitrogen estimation described in paragraphs 86 to 96 



Fig. 25. 



before he proceeds to the analysis of feeding materials. The re- 

 maining methods, which include the estimation of nitrogen when 

 nitrates are present, may be conveniently left over until the end of 



