4b THE MICROSCOPE AND ITS REVELATIONS. 



furnished with objectives suitable for the examination of dissections or 

 other preparations made upon the stage, without disturbing them by 

 moval to another instrument. 



45. Siebert and Kraft's Dissecting Microscope. In making minute 

 dissections, however, the hands are most advantageously rested, not on the 

 stage itself, but on supports at a level intermediate between that of the 



FIG. 3.7, 



Siebert and Kraft's Dissecting Microscope, as opened for use. 

 FIG. 34. 



Siebert and Kraft's Dissecting Microscope, as folded in case. 



stage and that of the table. Such a support, in some Continental Dissect- 

 ing Microscopes as those of Nachet and Zeiss is attached to each side 

 of the stage of an ordinary Simple Microscope ; but this arrangement is 

 subject to the disadvantage of causing the whole weight of the hands to bear 

 on 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 . 



