134 Milk and Its Products 
GLASSWARE NECESSARY FOR PLATING ONE SAMPLE OF MILK 
Nee HOO 
petri dishes. 1 250 c. c. glass-stoppered 
1c. c. (straight) pipettes. bottle. 
2c. c. pipette. 1 graduated cylinder 100 c. c. 
liter flask (water). 5 feet glass tubing, width 10 m. 
250 c. c. flask (litmus). m, or metal box. 
150 c. c. glass-stoppered 9 test tubes (Board of Health) 
bottles. 1 counting plate. 
GLASSWARE NECESSARY 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. pipette. 
to lac. 2 agate pails. 
APPARATUS 
Steam sterilizer. 
{Autoclave 
Hot air sterilizer. 
Or, . 
{ Steam aad or high altitude cooker 
an 
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. 
HCI (normal). Phenol phthalein. 
Agar (threads). Alcohol. 
Gelatine (Gold Label), Filter paper—diameter 45 c. m. 
Lactose (pulverized), 
