130 



DRAWING WITH THE MICROSCOPE 



\CH. V 



ink. Sometimes it is easier to draw on a black surface, using a white 

 pencil or style. The carbon paper used in manifolding letters, etc., 

 may be used, or ordinary black paper may be lightly rubbed on one 

 side with a moderately soft lead pencil. Place the black paper over 

 white paper and trace the outlines with a pointed style of ivory or 

 bone. A corresponding dark line will appear on the white paper 

 beneath. (Jour. Roy. Micr. Soc, 1883, p. 4 2 3)- 



Fig. 116. Bern hard'- 's Drawing Board for the Abbe Camera Lucida. This 

 drawing board is adjustable vertically, and the board may be inclined to prevent 

 distortion. It is also arranged for use with an inclined microscope , having the 

 base board hinged. ' Microscope and drawing surface are then inclined together. 

 {Zeit. wiss. Mikroskopie, vol. vi (1894, p. 29S). {Zeiss Catalog). 



(A) It is desirable to have the drawing paper fastened with thumb 

 tacks, or in some other way. (B) The lines made while using the 

 camera lucida should be very light, as they are liable to be irregular. 

 (C) Only outlines are drawn and parts located with a camera lucida. 

 Details are put in free-hand. (D) It is sometimes desirable to draw 

 the outline of an object with a moderate power and add the details with 

 a higher power. If this is done it should always be clearly stated. It 

 is advisable to do this only with objects in which the same structure is 

 many times duplicated, as a nerve or a muscle. In such an object all 



