18 BULLETIN 846 ; U. S. DEPARTMENT OF AGEICULTURE. 



EXAMINATION OF SAMPLES. 



After the samples had been prepared? frozen, and held in cold 

 storage for several weeks they were examined by three bacteriologists 

 and five chemists. Only one determination of each constituent was 

 made by each chemist, for the reason that four or five chemists per- 

 formed each determination, averages of which give very reliable 

 results. All bacteriological examinations were made in duplicate. 



RESULTS OF EXAMINATION OF SAMPLES. 



The results of the examination of the samples are given in Tables 

 8 to 23. For ease of comparison the histories of the samples and the 

 analytical results have been grouped in the same table. Moreover, 

 all of the samples of the same type have been gathered into each 

 table, and averages have been calculated. These tables are self- 

 explanatory, needing but the few additional comments which are 

 given on pages 55 to 59. Throughout, the use of terms as given in 

 IT. S. Department of Agriculture Bulletin 224, page 21, has been 

 followed. 



