[No. 133.] 99 



grooves, and the plate is driven down from top to bottom, forming 

 the outer corner of the box, and permanently embracing both 

 parts. In this case the metallic corner will project its thickness 

 beyond the wooden sides of the box. If it is desirable that it 

 should be flush with the wood, a revolving cutter may be ad- 

 justed to the shaft of the groove- cutting saw, and next to it, by 

 which the superfluous wood can be removed, and the plate, when 

 driven on the corner, will be flush with the wooden part of the 

 box. 



It is rather a misnomer to call this a Dovetailing Machine, be- 

 cause dovetailing is a manner of fastening boards together by let- 

 ting one piece into another with tenons, in the form of a dove's 

 tail spread. The machine in question seems rather designed to 

 supercede the labor of dovetailing, in putting the parts together 

 by other means, in a very permanent manner, cheaper and more 

 expeditiously. a. c. 



perry's improved stop motion paper cutter. 



The manufacture of paper of all descriptions, has been very 

 materially improved of late years. By the process now in use, 

 all paper for printing, and much of the papers for writing, are 

 made in one continuous sheet, and it is necessary to cut it into 

 such lengths or sizes as m^y be desired. This is done by ma- 

 chinery, and some difficulty has arisen from the imperfections in 

 the machines adopted, inasmuch as it was found difficult to cut 

 the sheets square, which is a very important consideration, as re- 

 lates to printing with the new fast power press, now generally in 

 use. 



Mr. Perry's improvement consists in the application of a 

 straight edge across the sheet, at the moment the cutting com- 

 mences, but does not arrest the descent of the paper from the 

 cylinder. The straight edge is operated by a cam, and nips the 

 paper just above the point of cutting, which is performed in an 

 nstant, and the straight edge being released, the paper descends 



