Trade card: Advertisement. George Adams, Mathematical Instrument-Maker to His Majesty, At Tycho Brahe's Head, in Fleet Street, London. n.d. [1750-1775] Letterpress on laid paper. Description and list of mathematical, philosophical and optical instruments made and sold: azimuths to zograscopes. oval woodblock engraved portrait of Tycho Brahe (Calv. 6), Gerorge Adams, United Kingdom, 1550-1775.