An English lacquered brass portable aquatic microscope, unsigned, second quarter of the 19th century With square section post fitted with lens above friction sliding up/down adjustable stage with ivory slip insert and tool post holes to rim, with pivoted mirror beneath and mounted via a sliding socket onto an oval brass foot, the velvet lined maroon morocco leather covered box with accessories including two additional lenses, forceps, tweezers, a specimen capsule and three bone sliders, 11cm (4.25ins approx.) wide. The design of the current lot is probably derived from a model developed by John Ellis in around 1752. The main difference being that the current lot focuses by up/down movement of the stage rather than the lens.
An English lacquered brass portable aquatic microscope, unsigned, second quarter of the 19th century With square section post fitted with lens above friction sliding up/down adjustable stage with ivory slip insert and tool post holes to rim, with pivoted mirror beneath and mounted via a sliding socket onto an oval brass foot, the velvet lined maroon morocco leather covered box with accessories including two additional lenses, forceps, tweezers, a specimen capsule and three bone sliders, 11cm (4.25ins approx.) wide. The design of the current lot is probably derived from a model developed by John Ellis in around 1752. The main difference being that the current lot focuses by up/down movement of the stage rather than the lens.
.jpg "Source: Christie's")
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
