CHAPTER ITI. 
THE UNIT HOUSE. 
Best Possible Construction for a Squab Plant— The Wind- 
Break Formation of Roof — Dimensions of the Unit — 
Mulitplying the Unit to Increase the Capacity of Your 
Plant — A Passageway behind the Nest Boxes — Number- 
ing the Nest Boxes, and the Management of a Card Index to 
Correspond — Cost of the Unit Construction is from Three 
Dollars to Five Doilars a Running Foot — Working Drawings 
— The Nest Bowls. 
If you have no building already standing which you can fix 
over for pigeons, you may erect a simple rectangular structure 
and line it with nest boxes as we have described in the last 
chapter. We will tell you in this chapter how to put up the 
finest kind of a pigeon structure. It is at the same time the 
most: expensive. It is the best, the most workmanlike. In 
saying that it is expensive, we do not mean that money is 
thrown away on its construction, for that is not so. It isa 
fit habitation for a money-making. investment. 
This best method of construction results in what we call the 
unit house. You can multiply this unit as many times as you 
please and get as large a house as you wish, or you may add 
a unit from time to time, just as you add unit bookcases to 
accommodate the growth of the modern library shelves. 
You can erect these units separately, or attach one unit to the 
other so that you have one long building. 
The nest boxes are built of boxing and set in a vertical row 
at the back of the house, forming a wall between which and 
the north side of the house is a three-foot passageway. You 
can buy this boxing at a saw-mill all cut, ten by eleven inches, 
the dimensions of the nest, and if you get it in this shape you 
can put the boxes together with as much ease as a child builds 
a doll’s house. You will have no doubts as to the squareness 
and plumbness of the structure when you have it up. Take 
long lengths of boxing eleven inches wide for the shelving 
which should form the top and bottom of the nest boxes, then 
set the ten-inch by eleven-inch pieces the proper distance 
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