most 
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ness 
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t Y W’unv.a)it, a ( 5<Wa . 
less interesting methods of delineating microscopic objects, or trans¬ 
ferring to paper, metals, or wood fac-similes of the appearances 
presented in the microscope^ The methods of accomplishing this 
have varied with the varying resources presented to art, by the 
progress of the sciences, 
34. The first attempts at delineation of this kind were made by 
dividing the field of the microscope into a system of squares, by 
74 - : 
APPEARANCE AS SEEN IN THE FIELD OF THE MICROSCOPE, THE OUTER CIRCLE BEING 
ONLY THE 30TH OF AN INCH IN DIAMETER. 
MICROSCOPIC DRAWING AND ENGRAVING. 
determines the form of the characters, and the motion in the direc¬ 
tion of the axis at right angles to that surface determines the depth 
of the incision, if it be engraving, or the thickness of the stroke, if 
it be writing. 
33. Having thus explained the principal results of the art of 
microscopic engraving, it remains to offer some notice of the not 
