121 







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B 



After 13th day 

 and before 



15th. 



Very slight sep- 

 aration on 9th. 



casein blue, 3 cm. deep, not 

 solidifled, and settles very 

 slowly; 27th, casein blue; 

 50th, colorreturning; whey 

 pale brownish red, casein 

 gray below, purple blue 

 above; 65th, lower one-half 

 of casein gray, upper one- 

 half purple blue, wneypale 

 purplish. 



15th day, 3 to 4 mm. whey on 

 top of the uniformly blue 

 casein; color deeper than 

 check; 22d,curd,uiiironiily 

 blue, not solidilied; about 

 same color as check; as in 

 all of the milk cultures tlie 

 casein has separated out 

 slowly as a voluminous. 

 noncoherent iirecipitate; 

 27th, curd3cm.dvci., blue, 

 with a traceof iiurjile in it: 

 50th, color oxidizing back; 

 whey dull brownish red, 

 upper one-half of casein 

 deep hyacinth blue, lower 

 one-half a dirty gray; (;5th, 

 casein hyacinth blue, 

 whey dull wine red (re- 

 flected light). 



15th day, slightly redd(>r by 

 reflected light than chccl.- 

 tube; 22(1, litmus in dec|)er 

 parts of tube dull purplish 

 blue; 27th, the litmus 

 which is not reduced is |)ale 

 pun)lish red by reflected 

 light; 43d, fluid and casein 

 dull purple; 50th, casein 

 dull hyacinth blue: whey 

 dull wine red (color is bare- 

 ly visible by reflected 

 light); (ioth, casein dark 

 blue, no purple in it; whev 

 dark by reflected light. 



o 



O O 



9th day, no red; 

 if any change 

 in color, bluer; 

 l;nh, milk uni- 

 formly blue 

 and slightly 

 deeper than 

 the check. 



9th day, no red 

 color, but a 

 lighter blue 

 than cheek; 

 13th, casein 

 blue, but pal- 

 er than check, 

 not solidifled. 





1st, 2d, 3d days, 

 n change; 

 6th and 7th, 

 color like 

 check. 



1st, 2d, and 3d 

 days, no 

 change; 6th, 

 no change; 

 7th, a trifle 

 lighter blue 

 than check. 





Good; excel- 

 lent yellow 

 surface 

 growth on 

 7th. 



Good; copious 

 surf ace 

 growth on 

 9th day. 









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