168 METHODS OF ANALYSIS. 



treated directly with 200 cc of water and 20 cc of 25 per cent hydrochloric acid 

 without previous washing or extraction, and the solution is made up to 250 cc 

 before filtering and drawing off the aliquot. 



9. Crude Fiber. 



Weigh 8 grams of the material (equivalent to about 2 grams of dry matter) 

 directly into an Erlenmeyer flask and proceed as directed under " XXIV. 

 Spices," on page 164, except that care is taken to add at first only a small 

 amount of 1.25 per cent acid or alkali, and shake thoroughly until all lumps are 

 broken up. If this precaution is not taken, the lumps will resist the action of 

 the acid or alkali and the results will be high. Extraction of the fat previous to 

 the treatment is impracticable, as this necessitates preliminary drying, after 

 which the material forms a horny mass. 



10. Detection of Coloring Matter. 

 Proceed as directed under " XXVIII. Coloring Matter," on page 190. 



11. Detection of Preservatives. 

 Proceed as directed under " XXVII. Food Preservatives," on page 179. 



