No, 149.] 135 



LATH MAKING MACHINE. 



Mr. C. Graff, of Philadelphia, exhibited an entirely novel ma- 

 chine for this purpose. It does its work complete, saves much 

 labor, and is so portable that it maj with ease be removed to 

 any place where its services are required. 



LEATHER SPLITTING MACHINE. 



Rowe's patent, exhibited by Messrs. Brown, Strevell & Zeli, of 

 Albany. This machine does its work with great exactness and 

 rapidity, and for the purpose intended, was deemed by the judges 

 to be very useful. 



ROPE AND CORDAGE MACHINE. 



Messrs. Slaughters & Perry, Frederickburg, Va., exhibited a 

 machine for making rope and cordage, which attracted much at- 

 tention. Its simplicity, compactness, and tlie perfection with 

 which it completed its work, were much admired and gave con- 

 clusive evidence of its utility. 



9 



MACHINE FOR BACKING BOOKS. 



This is a new invention, by Mr. Charles Starr, of the city of 

 New- York, a practical binder, and not an improvement of a pre- 

 viously existing machine. It is a substitute for the hammer in 

 forming the grooves to receive the boards or covers of the book, 

 and keep them in theii- proper position. 



By the ordinary method, the book after the back is glued and 

 rounded, is placed between a pair of jaws made either of wood 

 or iron, which are inserted between the cheeks of an ordinary 

 cutting press, where it is held fast by the screws which pass 

 through the two cheeks of the press. The edges of the jaws 

 are placed just far enough from the back to allow a groove to be 

 formed of the thickness of the cover. When thus prepared, a 

 hammer is applied to the back, and by repeated blows over the 

 whole surface of the back the grooves are formed. 



The machine now introduced, requires the book to be inserted 

 between the two iron jaws which are suspended by axles or 



