The plate illustrates various types of specialized microscopes and optical principles. Depicted are reflecting microscopes (1-3);solar microscopes (4-8);and lucernal microscopes (9-10);each with detailed letter references for components. The illustrations show both complete instruments and schematic representations of light refraction and ray paths. From Encyclopaedia Londinensis;or Universal Dictionary of Arts;Sciences and Literature. Comprehending;under one general alphabetical arrangement;all the words and substance of every kind of dictionary extant in the English language. Compiled;digested and arranged by John Wilkes. London;1810.
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