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SUMMARY OF CURRENT RESEARCHES RELATING TO 



an unlimited number of ways and, if the object be too large to be 

 entirely seen in the Microscope, means of orientation are provided. 

 Fig. 89 presents a lateral view of the insectoscope and fig. 90 an end 

 view. The apparatus is entirely supported by the very rigid vertical 



Objective. 



axis A, which connects it with the fixed part of the Microscope base. 

 This axis is situated in the prolongation of the optic axis, around which 

 the apparatus turns horizontally. An axle B constrained to remain in a 

 horizontal plane, and connected with the first by the exterior bent arm 

 D, supports the interior bent arm E, at whose extremity is placed the 

 object-carrier G. A milled knob F in one piece with the axis B and the 



