418 



SUMMARY OF CUERENT RESEARCHES RELATING TO 



A condensing lens slides into the short tube attached to the small 

 plate shown at the bottom of the figure, the plate being supported on 

 two side-pieces to keep it clear of the slide. 



Seibert also supplies the Microscope shown in fig. 65, the con- 

 struction of which, as will be seen, is very similar to that of Klonne 

 and Miiller. 



Seibert's Travelling Microscope. — This instrument (fig. 66) 

 is reduced in height (within a range of an inch) for packing, by- 

 making the standard which carries the body- 

 FiG. 66. tube and stage, slide in a socket attached to 



the tripod base. A clamp screw tightening 

 a ring on the socket allows the standard to 

 be secured at any given point. 



Klonne and Miiller' s "Pendulum 

 Stage."* — This (fig. 67) is another form 

 of mechanical stage (of German construc- 

 tion) intended to be attached to the ordinary 

 stage of a Microscope (as shown in fig. 68) 

 when it is desired to examine flesh infected 

 with TrichincB, or other objects which require 

 a systematic examination of the whole 

 surface. 



It consists of three plates, the lowest 

 being connected with the middle one by a 

 pivot " like that used for the hands of a 

 clock." By means of a clamping arrangement 

 attached to the lowest plate, the apparatus 

 can be fixed to the stage, care being taken 

 that the circular aperture in the middle 

 plate is centered with the axis of the micro- 

 scope-tube. The upper plate has a square 

 aperture, and carries the object. It slides on the middle plate by a 

 screw (the milled head of which is seen on the right). The move- 



FiG. 67. 



ment is regulated by two spiral springs. The object being in the 

 field, the two upper plates are moved slowly from front to back, or 



* See Centr. Ztg. f. Opt. u. Mech., ii. (1881) p. 113 (1 fig.). 



