Believing that the study of Agricultural Engineering should fill an important place in the training of the young man who would make farming the object of his life's work, the author has attempted to furnish in this volume an aid in supplying this part of his training. The application of agricultural engineering methods to agriculture should not only raise the efficiency of the farm worker but should also provide for hlm a more comfortable and healthful home. This volume has been written primarily as a text for secondary schools of agriculture, and for colleges where only a generaf course can be offered.

Claim is not made for much new material concerning the subjects discussed; but rather an attempt has ·been made to place under one cover a general discussion of agricultural engineering subjects which hitherto could not be secured except in several volumes and hence impractical for text-book purposes.