47 

 the average number of boxes hung over the whole area. Here, again, 

 the boxes must be hung more thickly on the edges of the woods and 

 the well-lighted spots than in dark places where the growth is dense. 

 In certain circumstances, unsuitable places of one or more acres have 

 no boxes, and a correspondinglj^ large number is hung in more favour- 

 able spots. 



3. The METHOD of hanging the boxes will be best seen in the 

 accompanying illustrations. The boxes are rightly fixed if they are 



hung vertically, or with the upper part projecting a little in the direction 

 of the opening, and the opening facing the east or south-east. 



The boxes are badly hung if inclined to^^'ards the side away from 

 the opening, or if the opening faces the weather-side. Boxes hung in 

 this way are, it is true, adopted by birds ; the openings of natural 

 holes are found facing every direction. But the rain easily penetrates 

 into these boxes and the young broods perish. We find proof of this 

 in natural as well as artificial holes. No harm results if the box 

 is inclined a little less to the right or left side. The side with the 

 opening must al^'ays be considered as the front. It must 



