PHILADELPHIA 
l>ot m Sterilizm 
Nos. 2200-2206 
Hot Air Sterilizers. — For sterilizing glassware, instruments, etc., by dry 
heat. By the system of hollow perforated doors a uniform degree of heat 
is rapidly obtained in all parts of the oven. They are made of the best Russia 
iron, with double walls. The heat is furnished by a powerful bunsen burner 
placed below the funnel-shaped opening at bottom of oven, where a removable 
sheet of copper is placed to prevent burning out. The air circulates between the 
double walls and escapes through the register in the centre of the top. The 
directly heated air and products of combustion do not communicate with the 
interior of the oven. 
2200. 9 inches high by 12 inches wide by 9 inches deep, without gas regula- 
tor, thermometer or Bunsen burner $12 50 
2202. 9 inches high by 15 inches wide by 9 inches deep, without gas regula- 
tor, thermometer or Bunsen burner 13 50 
2204. 9 inches high by 18 inches wide by 9 inches deep, without gas regula- 
■ tor, thermometer or Bunsen burner 15 OO 
2206. 12 inches high by 24 inches wide by 12 inches deep, without gas regula- 
tor, thermometer or Bunsen burner 22 50 
Improved gas regulator, extra 2 50 
Thermometer, 400° F. or 200° C, extra 1 60 
55 
