■i 



) 







'i 



pigure 18.— BarkmiU Detail, 1764. Horse Power and Wooden Gears. The detail 

 of the bark mill from Lalande's "Art du Tanneur" (Duhamel) suggests the 

 large cogwheel, face gears, and wallowers that geared Jacob Squibb's grmdmg 

 mill at Newport, Delaware, early in the nineteenth century. 



44 



