OF SECTION-CUTTING MACHINE. 24. r ) 



It will now be clearly seen that, on turning the micrometer screw 

 E, the inner tube C will be steadily advanced upwards, carrying with 

 it the material to be cut without any compression, and consequently 

 witbout any jerking, and sections may be readily cut with a chisel 

 or with a razor in the ordinary manner. With the machine now 

 before you, I have cut with ease and precision sections of fresh- 

 growing wood, -j-fg-o °f an mcn m thickness. 



The upper flange of the machine, which serves as a cutting-bed, 

 is provided with two strips of hardened steel. These form a very 

 convenient surface over which the chisel or razor may be passed 

 when cutting wood or softer sections, but they also serve another 

 very important purpose — At the back of the cutting-bed, B, I secure, 

 by means of a spring and screw, and steady-pins, a metal block, b 1 . 

 This block carries two hard steel rods, b 2 b 2 , which, when in place, 

 lie immediately over the two steel bars, b z (see Figs. 1 and 2), just 

 referred to. Now, by passing the blade of a fine saw between the 

 movable steel rods, b 2 b 2 , and the fixed bars, b b, on the cutting bed, 

 sections of bone or other material too hard to be cut with a knife or 

 razor may be sawn off, as thin as the nature of the material will 

 admit, and often sufficiently thin to be at once mounted. The rods, 

 b 2 and bars b, being of hardened steel, receive no injury from the 

 teeth of the saw. 



I think it will be obvious that a machine of this kind would be 

 useless unless carefully and accurately made, and consequently it 

 will be rather an expensive machine as compared with others of the 

 same class. However, I have had a couple made (besides this one 

 of my own), and I have placed them in the hands of Mr. Baker, of 

 244, High Holborn, and I have no doubt, with the resources at his 

 command, he will be able to supply any one who may wish for it 

 with a machine at as reasonable a price as is consistent with 

 efficiency. 



