THE INCUBATION OF THE EQG 



199 



Fig. 100 



A well-made incubator heater. 1, top cover cap; 2; pipe connecting heater 

 with heating chamber; 3 and 12^, castings attaching heater to incubator; 

 4, opening from diH|t heat flue (8) to waste-heat chamber (7) ; 5, asbestos 

 insulation; 6, fresh-l^jilL^™^^'^' ^' waste-heat chamber; 8, direct-heat flue; 

 9, escape flue for surplus heat produced in fresh-air chamber (6) ; 10, wire 

 mesh to keep out mice when mcubator is not in use; 11, pipe for conducting 

 fresh air into egg chamber;' 12, casttag<aita£^fflghea|g|to incubator; 13, 

 opening for the admission of air to fresh-air cnamber; 14, brace casting; 

 15, burner; 16, burner socket; 17, galvanized lamp bowl; 18, brace for fortify- 

 ing the bottom of the lamp bowl; 19, lamp support; 20, damper disk; 21, 

 filler cap and non-spilling gas escape. (Courtesy of Cyphers Incubator 

 Company.) 



