James Ferguson's crane, 1764-1776.
1764-1776
Ferguson solar chronometer
Machine for dividing and ruling the brass meridian rings of globes &c
1755-1775
Orrery planetary model by James Ferguson, 1755-1756
1755-1756
4 portrait miniatures or 'limnings'
circa 1730-1750
Compass and Sundial combined
1731-1776