96 



TRANSACTIONS OF THE 



that the rail cannot batter, the chair break, or the wedge come loose, and our ex- 

 pectation has been fully realized, and faithful trial by the New Jersey railroad for 

 the past year and a half has shown : 



1st. That it costs less to lay track than with any other kind of chair or joint, 

 for if the rails be placed in the chair, and the key driven, it must be right. 



2d. It costs less to keep the road in repair, as the joint is so protected that it is 

 not so liable to get out of order, and makes the most substantial road. 



[^ diploma awarded. 



Parkhursfs Portable Saw Mill. 

 B. E. Parkhurst, New York city. 



This machine is so peculiarly constructed that it is ready at all times to saw 

 timber, joist, plank, boards, slats, laths, clapboards, and shingles, of any length 

 and thickness, sash and blind stuff, treenails, and in fact all kinds of dimension 

 stuff, either square, beveling, or angling, that can be sawed with a circular saw. 

 Some of the advantages of this machine are as follows : 



1st. For re-sawing lumber out of boards, plank, or timber, of any desired Avidth 

 or taper, without measuring. 



2d. All of the straight lumber used by carpenters, sash, blind, and door makers, 

 millwrights, cabinet makers, and the manufacturers of cars, carriages, and agri- 

 cultural implements, can be sawed to good advantage with this machine, from the 

 round log, without removing any part of the machine, or making additions to it. 



3d. It can be built of any size, from four to sixteen feet long, and operated either 



