EXPERIMENT STATION BULLETINS. 



321 



Bacterial Counts. 

 In 44 hours. 



Culture Ilm— 2,330,000. 



Culture Ilm + IIx— 3,590,000,000. 



Culture IIx— 2,920,000,000. 



Culture. 



No. bacteria 

 introduced 

 in culture. ■» 



540 

 2,540 

 2,000 



17 

 127,019 

 127,000 



29,000 

 304,000 

 275,000 



17 

 1,817 

 1,800 



2,050,000 



2,S35,000 



285.000 



525,000 



626,820 



1,820 



693,000 



694,880 



1,880 



2,190 



093,820 



1 ,030 



1 ,480 

 18,780 

 17,300 



96,000 



144,000 



48.000 



4,460 

 300,400 

 296,000 



No. bacteria' i Acidity^ ' 



when I when I 



changed. Ichanged.! 



Culture appearance 

 when changed. 



102,000,000 

 1,980,000,000 

 1.990,000,000 



3,220,000,000 

 4,180,000,000 



442,000 



2,210,000,000 

 2,300,000 000 



1,330,000 

 2,060,000,000 

 1,970,000,000 



745,000,000 

 2,080,000,000 

 1.210,000,000 



100,000,000 

 1 ,700,000,000 

 1 ,440,000,000 



(record 

 destroyed) 



4,000,000 

 3,300,000,000 

 1 ,900,000,000 



225,000,000 

 2,400,000,000 

 1,600,000,000 



15,800,000 

 4,890,000,000 

 5,850,000,000 



2,330,000 

 3,590,000,000 

 2,920,000,000 



18° ! unchanged. 



69° ' soft curd. 



68° I soft curd. 



23° I no change. 

 85° litmus reduced. 



77° I litmus reduced. 



23° no change. 

 64° litmus reduced. 

 62° litmus reduced. 



21° no change. 

 76° loppered. 

 80° loppered. 



20° no change. 



56° loppering. 



38° litmus slightly reduced. 



21° no cliange in color: slimy. 

 79° slimy curd, litmus reduced 

 83° soft curd, litmus reduced. 



25° litmus reduced. 



86° litmus reduced, loppered. 



84° litmus reduced, l(jppered. 



19° no change. 

 82° loppered. 

 78° loppered. 



30° litmus .slightly reduced. 



66° loppered. 



58° beginning to lopper. 



23° no change. 



83° ! litmus reduced, loppered. 



86° litmus reduced, loppered. 



20° no change. 

 48° litmus reduced. 



54° litmus reduced. 



'Constant letter represents the lactic micro-organism. 

 ^Variable letters, a, b, c, etc., the associate micro-organisms. 

 'Counts and acidities made at the same time unless otherwise designated. 



*The column indicating the number of bacteria introduced refers to the total number introduced 

 into the flask containing 100 c. cm. of milk. 



MICRO-ORGANISMS OF SAMPLE II. 



Ila. 



Morpliologj". Bacillus. 



Size — average diameter, L2 microns; length, 1.6 microns to o.G microns. 



Motility — motile. 



Staining — staiiLS readily. 

 Gelatin C()lonJ^ 



Filamentous. 

 Gelatin Stab. 



Arborescent. 

 Agar. 



Glistening, opaque growtli. 

 Bouillon. 



Sediment at bottom, supernatant liquid becoming clear. 

 41 



