ZOOLOGY AND BOTANY, MIOROSCOPYj ETC. 



563 



I have tried botli these methods. The first has certain advantages, 

 in that it allows the drawing to be made on the table or other hori- 

 zontal plane, and also that the eye looks in the direction of the pencil. 

 But the inclination of the Microscope is not without practical difficul- 

 ties. It requires a special arrangement in order that in this position 

 the instrument may preserve a sufficient stability (I except, of course. 

 Microscopes made to be inclined, which can be readily adapted to this 

 purpose). This process, moreover, cannot be employed when it is 

 desired to draw preparations which contain moving parts, or other- 

 wise require to be kept horizontal. 



With the second method it is necessary, it is true, to draw on a 



Fig. 101. 



plane which is not horizontal, and the hand is therefore outside the 

 direction of sight, which is less convenient ; but by way of compensa- 

 tion the process may be applied to any Microscope whatever, without 

 its being necessary to modify its position or construction. All that 

 is required is an inclined plane whose inclination may be varied at 



2 o 2 



