Rane Boog Simpson, Thomas, 1716-1761. Essays on several
Derr,
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. 2hem.
With this are bound the author's Mathematical dissertations (London, 1743) and his Miscella- neous tracts (London, 1757)