l^ACHINE FOR SEPARATING IRON FILINGS, 127 



by experience it may be distinguished at a great distance. 

 Should you think this worthy of notice, it will be a satis- 

 faction to, 



Sir, your obedient servant, 

 August, ISW. 11. LB, 



The model consists of little tin casts of six horse soldiers 

 and one offictr, see PI. Ill, fig, 4. These are placed on n 

 •lip of wood, and each is movable on a pivot, so that it may 

 be tiitned into any position. 



^ ^ VIII. 



Description of a Machine Jbr separating Iron Filings from 

 their Mixture with other Metals : by Mr. J. D. Ross, 

 Princes Street, Soho*, 



SIR, 



4*- Hope you will be pleased to lay before the gentlemen Machine for 

 9f the Society of Arts &c. the model of a machine, which I separating iron 

 , .1 • nt- ^ • n n filings from 



have invented to separate iron-nhngs, turnnigs, &c., Irom other matters. 



those of brass or finer metals, in place of the slow and tedi- 

 ous; process hitherto employed, which is by a common 

 magnet held in the hand. By my invention many magnets 

 may now be employed at once, combined and attached to a 

 machine on a large scale. The magnetic hammers are so 

 contrived as to take up the iron-filings from the mixture of 

 Ib^tn with other filings, or metallic particles, placed in- the 

 trays pr^ end boxes, and drop them into the receiving hq^ 

 in the centre, which is effected by the alternate motion of a 

 wli>ch'.handle, working the two magnetic hammers placed 

 4t two angles of a quadrant or anchor. In proportion to 

 the power of the magnets, and to the force of the blow 

 given by the hammers, a great quantity of iron is separated 

 from the brass, by the alternate motion, and dropped into 

 the receiver placed in the centre of the machine. 



I have shown the model to persons engaged in various 



•Trans, of the Soc. of Arts, Sec, yol. XXVIII, p. 206. five gui- 

 neas w«rs voted to Mr. Ross for thi» invention. 



metallic 



