102 



ROYAL SOCIETY OF CANADA 



Potash Gelatin with Carhohydrates. — Streak cultures on the in* 

 clined gelatins at 18° to 22° C. 



Growth, Pigment, Liquefaction. 



KS, KP. 



KPDn, KPL, 



KPGa. 



KPS, KPD. 



12 



20 



38 



20,24,3f 



20,24 

 38 



A narrow band of growth. 



Growth equal, increasing-, no liquefaction. 



Band of growth 2 m.m. across, raised, wet-shining, 

 slimy, drawing out in threads. 



Pigment diffusing from the growth, emerald green 

 to green-blue. 



Same, also bright blue. 



Faint green-blue, fading later. 



Gelatin of the slant bright blue and vinous when 

 viewed lengthwise. The growth itself light blue. 



Colors bright blue and dark blue. 



Gelatin and growth green-blue. 



Bright blue and vinous. 



A furrow of liquefaction under the growth, little 

 blue pigment, fading later through lilac 



Liquefaction, most in KP, none in the others. 



In the 5. strongly pigmented cultures the edges of 

 the band of growth viewed with the microscope were 

 seen to be striate with transverse bands of pigment 

 grains. Pigment grains were also scattered in the 

 gelatin just beyond the edges of the band of growth. 



The vinous color increasing* especially just under 

 the growth. No liquefaction. 



Half liquefied. 



Nearly all liquefied. KP amber, KS colorless. 



Less liquefaction, pigment decreasing. 2/3 lique- 

 fied, colors various green blue and lead color fading 

 to amber, and rust color below. 



Slight liquefaction, gelatin dark blue, bright blue 

 and vinous. 



Gelatin half liquified and green-blue with lead 

 color, amber to rust color below. 



