. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. 12 PRACTICAL TBEATISE ON the end, C, a convex glass, and on its outside a male screw. Three thin plates of brass, E, are made to slide easily in the inside of the body to form the stage, one of these plates, F, is bent semi-circularly ia the middle, for the reception of a tube of glass, for viewing the circulation of the blood in small fish, whilst the other tw6 are flat, and between these last all the object sliders
. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. 12 PRACTICAL TBEATISE ON the end, C, a convex glass, and on its outside a male screw. Three thin plates of brass, E, are made to slide easily in the inside of the body to form the stage, one of these plates, F, is bent semi-circularly ia the middle, for the reception of a tube of glass, for viewing the circulation of the blood in small fish, whilst the other tw6 are flat, and between these last all the object sliders are introduced; between the stage and that end of the body into which the magnifier screws is a bent spring of wire, H, this answers the purposes of keeping the objects fixed between the plates of the stage, and of pressing the stage firmly against the screw-tube. The magnifiers suppUed with this microscope were eight in number, and the objects were adjusted to their focus by the screw-tube, D, for which purpose the screw was made of nearly the same length as the body. This instrument was held in the hand in such a position, that the direct hght from a candle or lamp might pass directly into the condensing glass; it was subsequently much improved by the addition of a spiral spring, instead of the curved one, and of a handle which screwed into the body at right an- gles to its length, and served the purpose of keep- ing the body in the hori- zontal position, Mr. "Wilson was also the inventor of a microscope for opaque objects, represented by fig. 9; this consisted of a thin piece of flat brass, B, about six inches long and half-an-inch wide, one end of which served as a handle, and to the other. A, the mag- nifier was screwed; con- nected with the middle of this piece of brass by a hinge was a jointed arm, PP,. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of t
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Keywords: ., bookcentury1800, booksubjectmicroscopes, booksubjectmicroscopy
