4 BULLETIN 563, U. S, DEPARTMENT OF AGRICULTURE. 



Table I. — Bacteria per cubic centimeter in 198 samples from twenty-two 1-gallon lots oj 

 commercial ice cream obtained from different manufacturers. 



Plant 

 No. 



Lot. 



Sam- 

 ple 

 No. 



Flavor. 



Dilution. 



• 



Number of 



colonies on 



duplicate 



plates. 



Average 

 count 

 per c. c. 



1 



A (fat 9.5 per cent, gelatin + ) . . . 



1 



Vanilla 



■nroTB ! 243 



229 



2,360,000 







2 







219 



198 



2,085,000 







3 







242 



243 



2,425,000 







4 







231 



245 



2,380,000 







5 







250 





2,500,000 







6 







264 



233 



2,485,000 







7 







230 





2,300,000 







8 







243 



245 



2,440,000 







9 







271 



235 



2,530,000 



B 



1 



Chocolate . . . 



T0600 



45 



46 



455,000 

 445,000 







2 





40 



49 







3 







50 



47 



485,000 







4 







67 



40 



535,000 







5 







52 



47 



495,000 







6 







60 



43 



515,000 







7 







42 



48 



450,000 







8 







49 



45 



470,000 







9 







57 



60 



585,000 



C 1 



Peach 



T6000 



146 



153 



1,495,000 





2 







160 



150 



1,550,000 







3 







137 



155 



1,460,000 







4 







148 



145 



1,465,000 







5 







140 



156 



1,480,000 







6 







170 



151 



1,605,000 







7 







153 



155 



1,540,000 







8 







154 



148 



1,510,000 







9 







154 



166 



1,600,000 



D 



1 



Vanilla 



! 



24 



26 



25,000 







2 







23 



25 



24,000 







3 







80 





80,000 







4 







20 



32 



26,000 







5 







20 



20 



20,000 







6 







30 



22 



26,000 







7 







40 





40,000 







8 







25 



26 



25,500 







9 







25 



27 



26,000 



E 



1 



Vanilla 



, 



64 



79 



7,150 







2 







117 





11,700 







3 







120 



96 



10,800 







4 







109 



118 



11,350 







5 







95 



118 



10,650 







6 







102 





10,200 







7 







138 



97 



11,750 







8 







77 





7,700 





9 







131 



129 



13,000 



2 



A 1 



Vanilla 



TiTBuSUTJ 



25 



62 



43,500,000 





1 2 







44 



54 



49,000,000 





3 







54 



46 



50,000,000 





4 







53 



47 



50,000,000 





5 







59 





59,000,000 







6 







58 



54 



56,000,000 







7 







67 



55 



61,000,000 







8 







50 



59 



54,500,000 





9 







59 



55 



57,000,000 





1 

 B ! 1 



Chocolate . . . 



TTroSmjTj 



217 



218 



217,500,000 





2 







212 



193 



201,500,000 







3 







186 





186,000,000 







4 







233 



217 



225,000,000 







5 







204 



195 



199,500,000 







6 







204 



184 



194,000,000 







7 







187 



174 



180,500,000 







8 







203 



200 



201,500,000 







9 







192 



184 



188,000,000 



