One letter to James Dinwiddie from Dudley Adams
One letter to James Dinwiddie from Ian Wood
Optics, No. 1-3
One letter to James Dinwiddie from Dr Blacklock
Optics
One letter to James Dinwiddie from D Burges
Two letters to James Dinwiddie from William Mackintosh Esq.
Plane Mirrors; Archimedes; Gravity