STEAM ENGINES, MACHINERY, &c. 



EXTRACT 



From the Report of the Committee on Steam Engines, 

 Models, and Machinery. 



The Committee " on Steam Engines, Models, Machines, &c." at 

 the late fair of the American Institute, held at Castle Garden, in 

 the city of New York, beg leave, by this, their Supplementary Re- 

 port, to enlarge upon and extend their remarks upon several of the 

 machines there on exhibition, which from their superior merits are 

 deserving a more full and particular notice, than was possible to 

 give to them at the time of holding the fairj owing to the hurry of 

 the moment consequent upon a large number of examinations. 



Among the number which your committee have so selected as 

 worthy of a particular consideration is the " Railway Drawing- 

 head," of Wm. B. Leonard, Esq., of Matteawan, N. Y. 



To duly appreciate the importance of this improvement, it will 

 be necessary to state, that the object and use of the machine called 

 a " Drawing-head," is to equalize the bat or sliver by which the 

 size of the ultimate thread is made uniform and even, and is highly 

 and vitally important in making a fine thread. The machine is 

 used intermediate, between the carding machine, and the ropeing 

 machine, in the series of machines by which cotton cloth is made. 

 The beautiful conception of equalization of a bat of cotton before 

 twisting into a thread, as done by such drawing- heads, is accom- 

 plished by combining and putting together a number of bats as they 

 come from the carder, and by the aid of the machine in question are 

 drawn out together, reducing the collected body of the whole to the 

 size of one, at the commencement^ and this process is repeated by 

 associating the thus multiplied bat with others of the same kind, 



