] CLAE 



Ea"TCATI3!T 





tl 



y li O U o j,_ 



*^^. 





1^ - ^ 



^ 











•:::::> 



B . T/.., Ji^n,,, . 

 C . The S/.eaK0. 



Figure 55.— Plow invented by Thomas Bord 



en and patented January 13, 1830 (restored patent 5774X). 



150 



BULLETIN 24 1 : CONTRIBUTIONS FROM THE MUSEUM 



OF HISTORY AND TECHNOLOGY 



