BULLOCK'S FIRST-CLASS MICROSCOPE A 1. 59 



ble of doing most ot the work required by the physician 

 and to those who can afford the luxury of having two- 

 stands something of this kind will be found a real con- 

 venience. 



Mr. W. H. Bulloch, of Chicago, manufactures seven 

 different forms of stands, from which we present the 

 following : 



It has the concentric, rotating, and mechanical stage y 

 with graduations for measuring angles ; is also adjusta- 

 ble, so that it can be accurately and perfectly centered. 

 There are also graduations connected with the horizon- 

 tal and vertical movements of the stage, by which the 

 exact position of an object can be noted and found with 

 more certainty than with the " Malt wood Finder." 

 The whole stage is sufficiently thin to admit an angle 

 of oblique light as high as 134 degrees, and, if required, 

 the stage can be made reversible. 



The sub-stage is fitted with the most complete move- 

 ments for centring or for oblique light with the achro- 

 matic condenser. It has one-fourth inch movement 

 each way ; rack and pinion ; divided circle for polariz- 

 ing; is so arranged that the sub-stage can be used 

 either above or below the main stage, and can be oper- 

 ated by hand or by tangent screws ; it is entirely separ- 

 ate from the mirror, but if desired .can quickly be 

 connected, so that the mirror and sub-stage turn 



