§ 129. FODDER. 251 



CHAPTER VIII. 

 FODDER AND FOOD. 



I. 



FODDER. 



129. In tlie examination of fodder, it is very desirable 

 that chemists should follow a common method. 



The processes of analysis that have been perfected at 

 the experimental station, Weende, by Henneberg, Stoh- 

 mann, Rautenberg, Ktihn, Aronstein, and Schulze, com- 

 mend themselves for general use. 



a. Preparation of the Sample for Analysis.— In order 

 that the sample may fairly represent a large quantity of 

 the fodder, a handful should be taken here and there from 

 all parts of the pile or the field, till 15-20 such portions 

 are obtained: mix the whole well together, and take 

 about 1 kilo, of dry fodder or 3-4 kilos, of green for the 

 sample. 



Cut it up with shears, weigh it, dry it for several days 

 in a drying-chamber at 50-60°, expose it to the air 24 

 hours, and weigh it again in this air-dried condition. 



h. Hygroscopic Water, — Grind 50 to 100 grms. of the 

 dry substance quickly in a steel mill and desiccate 10 grms, 

 of this powder at 110° C. 



c. Non-TOlatile Matter. — Incinerate the dried sub- 

 stance obtained in J, subtract carbonic acid and coal, and 

 calculate the non-volatile matter in the fodder as it was 

 taken for analysis, 



130. Reduce the rest of the air-dried substance to a 

 fine powder, by alternate grinding and sifting, and pre- 

 serve it in well-stoppered bottles. 



a. Water. — Desiccate 3-5 grms. of this powder at 



