252 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Browning's Portable Microscope— This Microscope as set up 

 for use is shown in Fig. 30. The stage has the usual rectangular 

 motions, and there is also a substage. The speciality of the instru- 



FiG. 30. 



ment is that the body-tube turns on a joint as shown m Fig. 31, and 

 that the posterior foot h of the tripod can be closed up between the 

 anterior ones. The whole instrument will then pack into a case 

 6x6x9 inches. 



