112 THE CORNING EGG FARM BOOK 



the V-shaped window drops, which have been so suc- 

 cessful on the Farm for the prevention of draughts. 

 The windows work on sash-weights, both top and bot- 

 tom. A Spring Roller Shade device, covered with 

 sheer muslin, with a screw eye on the window sill, is 

 so placed that the cord may be passed through it, hold- 

 ing the shade rigid. Thus, when the prevailing wind 

 creates a draught, the window may be opened to any 

 desired width, and the draught prevented by the shade. 

 In operating the incubators they are run empty for 

 a sufficient number of hours to adjust the regulator, 

 and to know they will maintain a temperature of 103 

 degrees exactly. 



Eggs Turned from Third to Eighteenth Day 



After eggs are placed in the incubators the process 

 of turning does not begin until the third day, after 

 which they are turned regularly twice a day until the 

 completion of the i8th day, when they are left undis- 

 turbed. 



103 Degrees Maintained 



The temperature at which the incubators are car- 

 ried for the first week is a matter of wide difference 

 of opinion. In many cases 102 degrees is the max- 

 imum temperature for the first seven days, after which 

 103 is maintained as closely as possible during the 

 remaining period of incubation. In operating the in- 

 cubators on The Coming Egg Farm it has been found 



