134 Milk and Its Products 



GLASSWAEE NECESSAKY FOR MAKING ONE LITER OF MEDIA 



1 thermometer (Centigrade 2 funnels, diameter, 15 c. m. 



scale). 1 flask (liter). 



2 burettes 50 c. c. graduated 1 5 c. c. pipette. 



to .1 c. c. 2 agate pails. 



APPARATUS 

 C Steam sterilizer. 

 -{ Autoclave. 

 I Hot air sterilizer. 



Or, 



f Steam cooker or high altitude cooker 



and 

 I Kitchen oven. 



2 4-quart aluminium or agate kettles. 



1 balances or scales (metric) sensitive to grams. 



6 wire baskets. 



1 hand lens. 



1 Bunsen burner or alcohol lamp. 



1 forceps. 



MATERIALS 



Beef extract (Liebig's). Litmus (cubes). 



Peptone (Wittes). Cotton (absorbent). 



NaOH (normal). Cotton, common. 



HC1 (normal). Phenol phthalein. 



Agar (threads). Alcohol. 



Gelatine (Gold Label). Filter paper diameter 45 c. m. 



Lactose (pulverized). 



