to accomplish this. In order to maintain a standard 

 distance of 10 inches or to vary this distance to meet 

 requirements the drawing surface must be raised or 

 lowered. This can only be done by blocks or books 

 and the tilting by underlaying or by cutting a block 

 with properly inclined surface, which, however, is fixed 

 in height. All of these methods are crude and cumber- 

 some and easily liable to derangement. An excellent 

 substitute is offered in the drawing table, Fig. 58, 



Fig. 58. 



which while simple in construction and inexpensive is 

 very serviceable. Upon its base, the upper part of 

 which is hinged, the microscope is clamped. The 

 drawing board is fastened to a hinged attachment which 

 is adjustable for height. The pawl at the right provides 

 the necessary amount of inclination and the extent of 

 this is indicated by a quadrant at the hinge. An arm 

 rest is provided which may be moved along the front. 



