NEGATIVE MAKING 87 



a pocket lens," usually an inch or more in 

 focus and magnifying less than ten diameters. 

 A delineation or picture of an object thus en- 

 larged would be a macrograph , and if produced 

 by the aid of photography, why should it not 

 be termed a photo-macrograph? At all events 

 I have chosen to coin that word and to define 

 it as a slightly enlarged picture or delineation 

 of a macroscopical object produced by means 

 of a lens and sensitized photographic plate. 

 A few reproductions of such pictures, with 

 details of methods employed in making them, 

 must bring to a close this already long 

 chapter. 



Photo-macrography is clearly beyond the 

 range of the student's microscope as usually 

 furnished. The initial magnification of its 

 lowest power (f), being about 15 diameters, 

 renders it impossible. Nothing higher than 

 2-inch or 3-inch will answer for this purpose, 

 and very few of these stands have sufficient 

 length of rack to permit focusing with them. 

 Some, as Spencer's, have a larger compound 

 body and draw-tube fitted with the society 

 screw, so that the objective may be carried 

 within the main tube and thus focused. Such 

 stands answer measurably well, though still 

 restricted for practical use by the smallness of 



