184 



It grows slightly along the stick. It does not grow at a temperature of 1011° F. 

 On Agar Plate it forms small pearly white colonies with a smooth outline and a 

 white spot in center. It grows as well on bottom of dish as on surface of agar. 

 On Lactose Litmus Agar it forms branched white colonies. It produces no lactic 

 acid. (See plate.) 



FORM No. 17. 



Obtained from Gregory & Dobbins' livery barn. This form is fairly abundant. 



Morphology. A diplococcus |" in diameter. * 



BioJogiccd Churactent. A non-liquefying, non-motile ferobic diplococcus. In 

 Bouillon it produces turbidity and forms a white sediment in the bottom of tube. 

 A white ring forms on tube at surface of liquid. On Agar Streak it forms a 

 slick, red colored growth along streak. In Gelatine Stick culture it grows only on 

 surface, is of a pink color and does not liquefy the gelatine. On Agar Plate it 

 forms small white colonies. The growth is very slow. On Lactose Litmus Agar 

 no change was produced in litmus, showing no lactic acid. It does not grow on 

 Potato. 



FORM No. 18. 



Obtained from Godman's livery barn. 



Morphology. A small micrococcus about ^" in diameter. 



Biological Characters. A non-liquefying, non-motile, a-robic micrococcus. 

 In Bouillon it produces considerable turbidity and forms a white ring on tube at 

 surface of liquid; it also forms a white precipitate in bottom of tube. On Potato 

 it forms a raised granular cream-colored growth along streak. In Gelatine Stick 

 it produces a white convoluted growth on surface, and does not liquefy the 

 gelatine. On Agar Streak it forms a milk white growth with irregular outline. 

 On Agar Plate it produces pale white luxuriant colonies with a smooth outline. 

 On Lactose Litmus Agar the colonies are small and white, producing considerable 

 lactic acid. 



Have the Common Yeasts Pathogenic Properties? — An Experimental 

 Study. By Eatherine E. Golden. 



Yeasts have always been considered as purely saprophytic organisms, and not 

 supposed to be parasitic in any sense ; but, in the light of some recent experi- 

 ments, this classification would seem to need reconsideration. These experiments 

 indicate not only that some yeasts are parasitic, but that they are also pathogenic. 

 These results are not at all at variance with developments made in the study of 

 other organisms, as many bacteria which at first were supposed to be saprophytic 



