i2 



be reflected up through the stage when the objects to be e- 

 amined are transparent; and when they are to be viewed by re- 

 flected light there is a dark ground of hard rubber (not shown 

 in the engraving) which is also carried by the stem, D, and 

 may be turned under the st.i^e, so as to cut off all transmitted 

 light. Dissecting needles (K and L), with neat handles, fit 

 into appropriate grooves. When the lenses and stage are re- 

 moved from the stem they are readily packed in the case; the 



Fig. 10. THE EXCELSIOR MICROSCOPE. 



stem is then turned down and held in its groove by the button, 

 E; the lid is drawn out of the groove, turned over, and re- 

 placed so that the vertical piece (C) closes the open end of the 

 box, and the whole thing is packed into a compass which readily 

 admits of its being carried in the vest po-ket. 



The lenses are well made, and being provided with a proper 

 diaphragm, great clearness of definition is secured. Two styles 



