202 



THE MICROSCOPE. 



thin sections, it would be quite impossible for the 

 microscopist to get on without a section-cutting 

 instrument. 



Hailes' Section- cutting Machine. A is a short tube 

 of about 1J inches in diameter, provided with flanges 

 B, B, at each end. The upper one of these flanges 

 serves as a cutting bed or table. Inside the tube A is 

 fitted, so as to slide freely up and down, a second tube 



c, in which is placed the material intended to be cut. 

 This inner tube is provided with two clamping screws 



d, d, topped into a block which passes through a slot 

 formed in the outer tube A, thereby preventing any 



PIG. 142. Dissecting Knives. 



FIG. 142a. Needles for teasing out Tissue. 



rotary movement of the inner tube. Inside the tube 

 c, and at its lower end, is secured the nut or boss D, 

 through which passes the micrometer screw E, pro- 

 vided with a milled head e, and a divided collar /. 

 This screw is carefully shouldered into a cock or 

 bracket r, forming part of the lower flange B. In order 

 to secure the machine firmly to the table, the upper 

 flange B, is screwed to a transverse bar of wood G, 

 which in its turn is secured to the table by the clamp 

 H, thus avoiding all strain upon the machine itself. 

 The material it is intended to cut may be packed in any 

 convenient manner in the inner tube C, and secured by 

 the clamping screws d, d. It will now be clearly seen 



