SOLID TRANSPARENT MEDIA. 

 FIG. 18. 



47 



Method of inoculation. (Woodhead and Hare.) 



Potato and Bread Mash. These pastes are used chiefly in the 

 culture of moulds and yeasts. Peeled potatoes are mashed with 

 distilled water until thick, and then sterilized in flasks f of an 

 hour for three successive days. 



Bread Mush. Bread devoid of crust, dried in an oven, and 

 then pulverized and mixed with water until thick and sterilized 

 as above. 



CHAPTER IX. 



SOLID TRANSPARENT MEDIA. 



Solid Transparent Media are materials which can be used for 

 microscopical purposes and which can readily be converted 

 into liquids. Such are the gelatine and agar materials. % 



Gelatine. Gelatine is obtained from bones and tendons, and 

 consists chiefly of chondrin and gluten. 



The French golden medal brand is the one most in use, found 

 in long leaves with ribbed lines crossing them. 



Koeh-Loffler 10 per cent. Bouillon-Gelatine. To the meat- 

 water as made for the bouillon are added 

 100 grammes gelatine, 

 10 " peptone, 



5 " salt, 

 to each 1000 grammes of the meat-water. 



