BAKER'S LATEST MICROSCOPE 



221 



top plate, and the other being removable a large flat stage becomes 

 available if required ; the top plate is provided with three stops, 

 adjustable, so that the centre of a 76 mm. x 25 mm. (3 in. x 1 in.) 

 or 76 mm. x 38 mm. (3 in. x H in.) slip is identical with the optic 

 axis when both the rectangular movements are at the centre of their 

 travel, thus enabling any desired field to be recorded ; the stage 



FIG. 177. Baker's R.M.S. 1'27 gauge microscope (1900). 



clips are mounted on two of these stops, all of which are removable. 

 It has a centring sub-stage provided with diagonal rack and pinion 

 focussing movement, and a fine adjustment, the milled head of which 

 is so placed that both adjustments can be conveniently controlled 

 without shifting the hand, and it is provided with plane and con- 

 cave mirrors, and the microscope is mounted upon a solid tripod 

 stand, with a bracket to support the instrument in a horizontal 

 position for photo-micrographic work. 



