Engraving, trade card of Dudley Adams, 60 Fleet Street London. [c1800]. 39x24.5cm to platemark. Advertising a wide range of optical, philosophical and mathematical instruments, astronomical instruments etc including demonstration pieces; terrestrial globe, air-pump, surveyor's level, forestaff, universal ring dial, protractor, waywiser, astronomical quadranton stand, azimuth compass, drawing instruments in case, Gunter's quadrant, military surveyor's gniometer, nocturnal, horizontal dial, level, backstaff, alidade and plane table, orrery, armillary sphere. Cartouche of patronage by King George III, below; portrait of Tycho Brahe, top (family firm began at TB's Head, 1735; Dudley continued it, 1795-1821). In frame 55x40x1.5cm. (16"x 10 1/2") (Calv. 5).