THE KIND OF HOUSE TO BUILD 33 
to close them when the weather gets a little chilly, 
he had better consider the open-front house care- 
fully, always bearing in mind that he can drop bur- 
lap in front of the perches if he finds it necessary. 
Curtains that are not frequently cleaned, soon be- 
come clogged with dust, so that they admit little 
more air than a board. Then, of course, their chief 
merit, that of providing ventilation, has departed. 
The tendency in the direction of open-front houses 
has brought about another change, in the form of 
deeper houses than have been common, the reason 
of which has already been explained. Houses 
twenty feet deep or more are now being planned, 
but in such a house the sunlight will not reach the 
roosting quarters unless a shed roof is used and 
raised to a quite impracticable height in front. As 
direct sunlight is most desirable for sanitary rea- 
sons, windows in the roof have been devised. 
Sometimes the semi-monitor type is adopted. 
Such a house is in use at the New Jersey Experi- 
ment Station, and the type is warmly commended 
to farmers in particular by practical men. More 
than ordinary interest is being shown in this house 
because it is a radical departure from the type which 
has been generally recommended of late years. It 
