4 BULLETIISr 361^ U. S. DEPARTMENT OF AGRICULTURE. 



Table 1. — Comparison of bacterial count with Gerber sediment test iunjiltered market milk). 



Sample No. 



Bacteria 

 per cubic 

 centimeter. 



Character 

 of sediment. 



Sample No. 



Bacteria 

 per cubic 

 centimeter. 



Character 

 of sediment. 



1 



2,690,000 



1,812,000 



1,537,000 



186,000 



643,000 



Fair. 



Medium. 



Good. 



Bad. 



Medium. 



6 



7 



8 



1,206,000 

 108,000 

 263,000 



1,803,000 

 319,000 



Fair. 



2 



3 



Bad. 

 Good. 



4 



9 



Fair 



5 



10 



MediuTTi, 







In these results it will be seen that some samples had a high bac- 

 terial comit, yet tested ''good" or "fair" with the sediment test, 

 wliile others wliich had a low bacterial count tested "medium" or 

 "bad." 



Plate I, figure 2 (upper), shows two of the samples — No. 7 and No. 1. 

 No. 7, having a large amount of sediment and classed as "bad," has 

 a low bacterial count, while the otlier, No. 1, is classed as "fair," and 

 has a liigh bacterial count. 



Table 2 shows the tabulated results obtained by comparing the 

 bacterial count with tlie Wizzard sediment test on 10 average sam- 

 ples out of the 50. 



Table 2. — Comparison of bacterial count with Wizzard sediment test {unfiltered market 



milk). 



Sample No. 



Bacteria 

 per cubic 

 centimeter. 



Character 

 of sediment. 



Sample No. 



Bacteria 

 per cubic 

 centimeter. 



Character 

 of sediment. 



1 



2,131,000 

 622, 000 



1,391,000 

 812,000 

 377,000 



Fair. 

 Good. 



Do. 

 Bad. 



Do. 



6 



246,000 

 3,558,000 

 4,102,000 

 2, 688, 000 



243, 000 



Bad. 



2 



7 



Fair. 



3 



8.. . 



Good. 



4 



9 



Fair. 



5 



10 



Bad. 









It will be seen here that a greater difference occurred than in the 

 preceding table. 



Plate I, figure 2 (middle) shows disk No. 8, classed as "good," con- 

 taining 4,102,000 bacteria per cubic centimeter, while disk No. 10, 

 classed as ''bad," contained only 243,000 per cubic centimeter. 



Table 3 shows the tabulated results obtained by comparing the 

 bacterial count with the Lorenz sediment test on 10 average samples 

 out of 50. 



Table 3. — Comparison of bacterial count with Lorenz sediment test {unfiltered market 



milk). 



Sample No. 



Bacteria 

 per cubic 

 centimeter. 



Character 

 of sediment. 



Sample No. 



Bacteria 

 per cubic 

 centimeter. 



Character 

 of sediment. 



1 



768,000 

 99,000 

 63,000 

 57,000 

 34,000 



Fair. 



Good. 



Bad. 



Do. 



Do. 



6 



48,000 



27,000 



7,200 



329,000 



49, 000 



Fair 



2 



7 



Do 



3 



8 



Do 



4 



9 



Do 



5 



10 



Good 









