Micrographia : containing practical essays on reflecting, solar, oxy-hydrogen gas microscopes; micrometers; eye-pieces, &c. &c. (1837)
Goring, C. R., 1792-1840, Pritchard, Andrew, 1804-1882, joint author · London : Whitaker and Co. · leaf 231
holding a fine steel screwwith a conical point, which latter acting against a block * See Treatise on Optical Instruments, p. 36, fig. 36. 218 THE MICR0GRAPH1A. carrying the object held in a safety slider-holder, is forcedupwards by the conical end of the screw acting as an inclinedplane, while a… … III. ON AN IMPROVED MODE OF SUPPORTING A CANDLE OR LAMP FOR MICROSCOPES. Observers with the microscope are fully aware of the im-portance of the proper illumination necessary to make thatinstrument produce the best effect: much depends upon thedirection of the illuminating source, and when once…
Microscopy
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