99S 



No, 16,937. 



STEAM. 



D, B, SPENCER 

 Steam Plow. 



Patented Mar, 31. 1857. 



3. R. GRAY 



81 am-Plow. 



Palent«rt Oct. 20. 1S51 



W. E. WARD. 



Steam Plow. 



Nu. 18,479. 



Patented 0«. 20, 1867. 



