138 PRACTICE OF POULTRY-HOUSE CONSTRUCTION 
frame which is hinged at the back and can be raised for cleaning. It 
is desirable to raise the roosts so as to force lazy hens to the floor. 
The floor is made of cement, and any tendency toward cold 
is eliminated by the liberal use of straw, which in addition compels 
the hen to exercise in her search for feed. Cement floors are cold 
because of dampness. This may be prevented by the use of a layer 
of tar paper in the construction, as already described. 
Frame in processof construction. 
\ 
ey 
Nearing completion. 
ages Beets Bie = 
Fic. 91b.—Half-monitor type of laying house *: Under construction. 
For ease in cleaning, all fixtures are portable, and all nests 
and boxes have sloping tops, thus eliminating the accumulation 
of filth on the internal fixtures. This house is well adapted for 
commercial use. 
A Ha!lf-monitor Laying House.—This house has an entire glass 
front in the peak (Figs. 91a and 916). The extension in front is 
*This house was constructed from plans and specifications prepared by 
A. L. Clark of the New Jersey Experiment Station. 
