Two Tracings in one frame (19 3/4" x 15") of "Old Bess" Pumping Engine (1) 1777 and (2) 1848 respectively
Two Tracings in one frame (19 3/4" x 15") of "Old Bess" Pumping Engine (1) 1777 and (2) 1848 respectively, taken from letter book C.
These sketches are reduced from originals that probably represent, on the left, the engine as constructed in 1777; on the right, its state previous to its being dismantled in 1848.