6 CONTENTS. 



PRECIPITATION WITH TRICHLORACETIC 



ACID 49 



TITRATION WITH FEHLING'S SOLUTION. . .50 



DETERMINATION OF LACTOSE SO 



SOXHLET'S AND ALLIHN'S GRAVIMETRIC 



METHODS 52 



ESTIMATION BY MEANS OF CIRCULAR PO- 

 LARIZATION 55 



DETERMINATION OF CITRIC ACID 56 



HI. DETECTION OF PRESERVATIVES. 



BORAX AND BORIC ACID 60 



BORIC ACID, SODIUM CARBONATE, BICAR- 

 BONATE 61 



SALICYLIC ACID AND BENZOIC ACID 62 



DETECTION OF BENZOIC ACID 62 



DETECTION OF FORMALDEHYDE 64 



CHROMIC ACID, BICHROMATES, AND MER- 

 CURY SALTS, ETC 65 



SODIUM FLUORIDE AS A PJiESERVATIVE. . .66 



IV. DETECTION OF ADULTERATIONS. 



ADULTERATION WITH WATER 67 



ADULTERATION WITH STARCH, DEXTRIN, 



ETC 71 



V. ESTIMATION OF INSOLUBLE FOR- 



EIGN MATTER. 



DETERMINATION OF INSOLUBLE MATTER. 72 



VI. EXAMINATION OF CONDENSED 



MILK AND CURDLED MILK. 



RENCK'S METHOD 73 



CONDENSED MILK 75 



CURDLED MILK 75 



METHODS OF PREPARATION AND CULTI- 

 VATION 77 



QUANTITATIVE ESTIMATION OF GERMS: 



MILK ANOMALIES 78 



DEMONSTRATION OF INDIVIDUAL PATH- 

 OGENIC BACTERIA IN MILK 84 



