PLOWS AND PLOWING. 133 



Fig. 108 is such a plow as is now used in some 



parts of Grermany. 



Fig. 109 is one of the hest im- 



Fig. 109. 



proved cast plows. Nearly as great a difference ex- 

 ists between the plows used here fifty years ago and 

 at the present time. Some portion of this great im- 

 provement may have heen effected by persons not fa- 

 miliar with science ; but if such persons were enabled 

 to achieve so much, with the few truths which they 

 had themselves laboriously discovered, how much more 

 they might have accomplished if they had enjoyed the 

 advantages of all that strong-minded men have discov- 

 ered during the course of ages, and wliich is collected 

 together in the form of modern science. How much 

 more, too, would be saved in time and tedious exper- 

 iments, by applying the principles of science already 



