1851 Great Exhibition: Official Catalogue: Class X.: James Smith and Richard Beck
253. SMITH, JAMES, and BECK, RICHARD, 6 Coleman Street — Manufacturers.
Glass case; in the top, are stands for compound achromatic microscopes, constructed so as to avoid tremor, with adjustments and complete apparatus. In the middle, are the requisites for mounting microscopic objects, the cells, slips, thin glass, fluid covers, etc., and a few preparations as specimens. The bottom is a new form of cabinet for the objects.
Two tables, with revolving tops, for successively turning the microscope to two or three persons who can conveniently sit round.
[A compound achromatic microscope consists of two or more combinations of lenses, by one of which an enlarged image of the object is formed, and by means of the other, or eye-glass, a magnified representation of the enlarged image is seen.]