chamber and hang up your moisture schedule beside 

 the machine. When you want more moisture slide 

 open the- covers, and when you want less, close 

 them. Isn't that simple ? " 



Yes, dear friend, wiser heads than yours or ours 

 thought of that years ago, but it would not work 

 then, and it will not work now. 



Why? 



For various reasons ; among them : the Great 

 Ruler of the Universe will not permit us to slide 

 the covers of His moisture pans ; and while we are 

 obliged to circulate fresh air in the egg chambers 

 of our machines, we are obliged to have it more or 

 less humid or dry, just as it comes from the breath 

 of nature. 



The hygrometer is useful to experiment with, pro- 

 vided it is a good one, but few of those which are 

 sold to poultrymen are reliable. 



Still someone says, "Well, I know that the 

 humidity of the atmosphere varies some, but I still 

 believe I can work it with the moisture gauge and 

 the sliding covers on moisture pans." 



Very well, we will ask you for one demonstration, 

 and if you make that satisfactory, we will ask for 

 one or two more but one will probably be all you 

 want at a time. 



Let us suppose that you conclude that you want 

 thirty degrees of moisture in the egg chamber the 

 first week, thirty- five the second and part of the 

 third, with ninety degrees from the pipping of the 

 first egg ? All right. We will take for granted 

 that your gauge is correct. Well, here we are at 

 70 



