June, 1942] Agricultural Experlment Station 



insulated with 7/16" insulating board on all sides and ceiling', with 

 shavings packed as a lill between studding on the three exposed out- 

 side walls. This pen was equipped with a commercial ventilating 

 system with four intake flues and a central ceiling outtake flue, man- 

 ually operated. 



Pen 12, adjacent to Pen 11, was insulated on all sides and ceiling 

 with a similar commercial 7/16" insulating board without shaving 

 fill. The ceiling was so constructed as to allow a forward motion of 

 air to pass out o\'er the front plate as in the usual rafter ventilation 

 process. 



Pen 13, adjacent to Pen 12, was uninsulated but provided with 

 a straw lofi: during the vears 1933-40. This loft was removed for the 

 1940-41 season. 



Pen 14, next to Pen 13, was used during 1938-40 as an uninsulated 

 pen with front sliding-curtain ventilation. For the 1940-41 season 

 this pen was ecjuipped with a ventilating system identical to that in 

 Pen 11. 



Pens 15. 16. 17 and 18 were all similar in construction, non- 

 insulated, with ventilation provided by front sliding curtains, man- 

 ually operated. 



The curtains in all of these pens were of glass-substitute material. 



Pens 1 and 2 constituted a separate 30' x 60' two pen laying house 

 with 1" fiber insulating board, provided with sliding glass windows 

 and furnished with dropping pits attached to the side walls of each 

 pen. Pen 1 was equipped with a commercial ventilating system of the 

 convection type having a thermostatically controlled outlet valve at 

 ceiling level and a main outlet opening about 18" above the floor level. 

 Pen 2 was equipped with a commercial ventilating" system provided 

 with an outlet at ceiling level and a four speed exhaust fan installed 

 in the outlet flue. Pen 1 was located above a heated incubator cellar 

 while Pen 2 was above a closed-in cellar containing a small heated 

 room opproximating ^ of the floor space of the above pen. 



PEN EQUIPMENT USED 



All feeders were of a conventional type supported on legs about 

 18" oft' the floor. The nests were all metal, thirty nests being provided 

 in pens 11 to 18 inclusive, and forty units in pens 1 and 2. Grit and 

 shell hoppers were in each pen. 



The pens in the long house were provided with dropping plat- 

 forms with wire covered roosts. Pens 1 and 2 were equipped with 

 dropping pits. 



All pens of birds were supplied with artificial lights during the 

 fall and winter period through a central time switch, thus providing 

 a normal 13^ hour light period daily. 



The waterers were open refrigerator pans mounted on stands. 

 During the winters of 1939-41, these waterers were placed over in- 

 verted metal electric hover tops to collect and measure water spillage. 

 Electric water heaters were used in Pens 11 to 18 inclusive, but not in 

 heated Pens 1 and 2. 



