of two brass pins must be left out (not connected) 

 until the temperature in the egg chamber rises to 

 102. Then insert the rod, and connect as shown 

 in the illustration. When heating up the machine 

 let the cover J rest on the escape E. To raise the 

 temperature of the egg chamber, raise the two nuts 

 on the perpendicular rod ; to lower the tempera- 

 ture, lower the same nuts. Run the machine 

 between 102 and 103. The cover should be raised 

 from the escape about one-sixteenth of an inch at 

 102. This will give a surplus heat which will not 

 rise above 103, but if the temperature of the room 

 should fall 40 degrees, and the temperature of the 

 egg chamber should fall one-half a degree, ttte 

 closing of the escape valve will change the current 

 of the escaping heat at once, making it impossible 

 to cool down ; at the same time the cutting off of 

 the excessive outward draft increases the flame of 

 the lamp, without turning the wick or using any 

 device upon the burner or wick. It is done by the 

 change of draft alone. 



The thermostat in the egg chamber opens and 

 closes the escape valve to decrease or increase the 

 heat in the heat reservoir, but does not open or 

 close any valve in the egg chamber. The brass 

 " guide" straddles the lever. The "support" 

 holds the lever by a brass pin on which it works. 

 The nuts on the perpendicular rod are to adjust 

 the regulator. The nuts on the end of lever are to 

 balance it to the makers' adjustment, and must not 

 be moved. Run the machine between 102 and 103 

 let 102 be your low point, and 103 your high 

 90 



