Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 302
he lenses acquire the desired convexity.Objects held below the glass will be more ot less magnified,according to the diameter and convexity of the drop. A convenient stand for the water lens is shown in Fig.292. The detail views are vertical sections of the lenses,showing the screw for adjusting… … Simple Water Lens Microscope. standard, and has wound upon it a strong silk thread, oneend of which is tied to a pin projecting from the stage-sup-porting sleeve. An elastic rubber band is attached to thelower end of the sleeve, and to a pin projecting from thestandard near the base, to draw the…
Physics · Lantern projection · Electric apparatus and appliances
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