RARE Book Depr.
Simpson, Thomas, 1710-1761. Essays on several curious and useful subjects ... 1740. (Card 3)
Another copy. 23cm.
Bound with B. Franklin's Experiments and obser- vations on electricity (London, 1751) and his Supplemental Experiments and observations (Lon- don, 1753)
Another copy. 24cm.
With this are bound the author's Mathematical
dissertations (London, 1743) and his Miscella-
neous tracts @ (London, 1757)