John Deer
"It is the purpose of this book to assist instructors in form mechanics in giving a thorough and practical course in the operation, care, and repair of the more important farm machines. It is designed especially for those who make a study of farm mechanics in high schools, colleges, and short courses with the expectations of applying the knowledge gained to actual farming or to the instruction of others.
The Study of the operation, care and repair of farm implements becomes increasingly important with the steady growth in the use of farm machines. The farmer of today, with his machines of greater working capacities, must be a more efficient mechanic than were his father and his grandfather, whose machines were comparatively simple.