Microscope No. 233 has several unusual characteristics that suggest it is an early George Adams Jr. microscope.
George Adams (Jr.?) Microscope No. 233, (1760Ð1780)
George Adams Jr. Microscope No. 17 (1790)
George Adams Jr. Microscope No. 6 (1780Ð1785)
The signature engraving differs from later Adams' signatures.
The Lieberkuhn position marks on the downtube are drawn by hand.
The position lines were drawn poorly by hand.
There are no coarse focus position marks on the support pillar. The Cuff-type microscope (shown here on the right) had coarse focus positions engraved on the support pillar.
Adams No. 233 (this instrument)
J. Cuff No. 17 (1745)
Crudely cast support truss.
