Problems in woodwork in combination with other materials for elementary manual training (1917)
Worst, Edward F. (Edward Francis), 1866-1949 · Milwaukee, Wis., The Bruce publishing company · leaf 33
Fig. 16—Wren House … Fig. 17—Book Trough Bird Houses The bird life of our nation should be a matter ofconcern to every one, since the birds are one of ournations most valuable assets. The loss in theUnited States to crops, fruits, etc., from insects isestimated to exceed $800,000,000 each year. Birds are the chief…
