The holes are made oval to
allow all the little ones to get their heads out for fresh air.
The long overhanging eaves protect the little birds from the hot
summer sun. The rooms are made up with partitions on the inside so
each opening will have a room. The inside of the rooms should be
stained black.
** Boomerangs and How to Make Them [202]
A boomerang is a weapon invented and used by the native
Australians, who seemed to have the least intelligence of any race
of mankind. The
[Illustration: Details of Three Boomerangs]
boomerang is a curved stick of hardwood, Fig. 1, about 5/16 in.
thick, 2-1/2 in. wide and 2 ft. long, flat on one side, with the
ends and the other side rounding. One end of the stick is grasped
in one hand with the convex edge forward and the flat side up and
thrown upward. After going some distance and ascending slowly to a
great height in the air with a quick rotary motion, it suddenly
returns in an elliptical orbit to a spot near the starting point.
If thrown down on the ground the boomerang rebounds in a straight
line, pursuing a ricochet motion until the object is struck at
which it was thrown.
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