22 MICRO-ANALYTICAL METHODS 



The great advantage of the micro-analytical work as compared 

 with chemical work lies in the fact that small amounts of the 

 substances are used for analysis, the equipment is comparatively 

 inexpensive and the results are quickly attained. From twenty 

 to forty and even sixty samples of simple spices can be examined 

 in one day, from five to twelve samples of powdered vegetable 

 drugs, cocoas, chocolates, flours, meals, etc., and perhaps an 

 equal number of jams, jellies, etc. 



Because of the very close relationship between the micro- 

 scopical and bacteriological work, as already explained, certain 

 essentially micro-analytical methods will be given under bac- 

 teriological methods, more especially in Chapter 2 of Part II 

 which deals with the direct bacterial counts, and also under milk 

 analysis, water analysis and meat analysis. 



