BINOCULAR DISSECTING MICROSCOPE. 



I6 5 



Recognising the advantages of binocular vision for the 

 purposes of dissection, as well as the erection of the image, 

 Mr. Baker and also Messrs. Swift and Son have introduced 

 a cheap form of the Stephenson binocular, as shown in 

 Fig. 151, the details of which have already been described 

 on page 35. 



FIG. 151. 



If the erection of the image be desired, it can be obtained 

 by the use of the draw-tube and erector already illustrated 

 by Figs. 32 and 33, and this method has many advantages 

 over the use of the Stephenson binocular. The erector 

 screws into the end of the draw-tube, and using the A eye- 

 piece with a J-inch objective any amplification from 2-5 to 

 66 diameters may be obtained, or from 12 to 260 diameters 



