Ml jJgJU KKWMta 





^ 



Ye/ t /i«^^'/ 



■^///r/z/rV z-/^,, !</ V/j*;!;- 



Figure 12. — Plane stocks of cast iron patented by Hazard Knowles on August 24, 1827 (restored patent 4859X). 



€ 



A 



r 



Figure 13. — Cast-iron bench plane patented by William 

 Foster. Patent 3355, November 24, 1843. 



122 



BULLETIN 24 1 : CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



