twenty times as much air will be circulated through 

 the egg chamber as there was the day previous or 

 on a cooler day, and the next day it may be more 

 or it may be less. 



If there is no water in the moisture pans on the 

 very warm day, then there is from ten to twenty 

 times the amount of evaporation from the eggs ; if 

 the pans are filled, you will not have the same 

 amount of moisture when the valve is open as you 

 have when it is closed. 



Let us suppose, for argument sake, that we 

 have more moisture in the egg chamber with the 

 valve closed than with it open ; then, when the 

 valve opens to cool off the egg chamber, the 

 moisture escapes with the heat, and we have from 

 ten-fold to twenty-fold reduction of moisture on the 

 hot day, or when the machine is overheated. 



But suppose we say that when the valve is open 

 there is from ten to twenty times as much water 

 evaporated as there would be with it closed, and 

 that this water or moisture passes over the eggs ; 

 then we have practically from ten to twenty times 

 as much moisture with the valve open as we have 

 with it closed. 



Clearly we cannot have the same amount of 

 moisture with an open valve as with it closed no 

 matter which condition of valve gives the most, 

 and, as this valve may open and close once a day 

 or fifty times a day, how is it possible to maintain 

 an even condition or degree of moisture in an egg 

 chamber which is thus " regulated ?" 



Then why use a moisture gauge ? 

 66 



