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RECORD OF CURRENT RESEARCHES RELATING TO 



The tube can be readily replaced by a Brucke lens ; tbe stage is hol- 

 lowed out beneath, and has a concave diaphragm, shown in the foregoing 

 figure, specially adaj)ted to it. The four object-glasses are attached to 

 a revolving " nose-piece," of exceptionally small size, which in packing 

 can be screwed to the foot of the stand. The space beneath the stage 

 is also utilized, in j^acking, for the Camera Lucida as well as the 

 mirror. The latter is provided with universal movement by an 

 extremely simple and ingenious arrangement. The upper part of the 

 instrument with the stage can be turned round the optic axis. 



Schobl's Dissecting Microscope.* — This instrument, which is 

 shown in Fig. 7, consists of a heavy brass base-plate (17 cm. by 

 12 cm.), on which is supported the stage (22 cm. by 12 cm.) by three 

 ujjrights, the mirror being attached to one of them. 



Fig. 7. 



At one of the comeis of the stige fuithtst fiom the obsciver is 

 an upright rod 16 cm high, to which five movable aims of 2^ cm, 

 diameter are attached, each arm being cajjable of being fixed" by a 

 screw, as shown in the figure. The lowest carries an aplauatic lens 

 magnifying 30 times; the next, a similar lens, magnifying 15 times, 

 the third, an ordinary dissecting Microscope, magnifying up to 150 



* ' Arch. JI:kr. Anat.,' xvii. (1879) p. 1G5. 



