814 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Seibert and Kraft's Dissecting Microscope. — Dr. Carpenter 

 figures this instrument,* which he commends in preference to those 

 forms in which the supports for the hands are attached to each side 

 of the stage, " an arrangement which is subject to the disadvantage 



Fig. 17?). 



Fig. 176. 



of causing the whole weight of the hands to bear upon the stage so 

 as by depressing it to throw the object out of focus unless the stage 

 be made of extraordinary solidity or be supported in front as well as 

 behind." 



* ' The Microscope,' &c., 6th ed., 1881, pp. 54-5 (2 figs.). 



