^Ijillctr Irait. 



By THOMAS MOEGANS. 



(Abstract of Paper read on Tuesday, January 18th, 1887.) 



A MONG tlic descriptions of chilled castings in common 

 -^-^ use, the anthor instanced the following : — slicet, corn- 

 milling and sugar rolls, tilt hammer anvils and bits, plough 

 shares, " braases " and bushes, cart-wheel boxes, serrated 

 conos and cups for grinding mills, railway and tramway 

 wheels and crossings, artillery shot and bolts, stone-breaker 

 jaws, circular cutters, etc. Mr. Morgans then spoke of the 

 high reputation of sheet mill rolls and wheel axle-boxes 

 made in i3ristol. Of the former ho remembered that so long- 

 as thirty yeai's ago sheet I'olls made by Messi's. Bush & 

 Boddoo (predecessors of Messrs. Bush & do Soyres), of 

 Cheese Lane, were most genei-ally in use in the tinplate 

 mills of South Wales. Of the latter, in combination with 

 wrought iron wheels and steeled axles, the local Wagon 

 Works Company are exporting large numbers. 



The comparative hardness of good chill and that of the 

 most higlily hardened steel, used for say die stamping or 

 chill cutting, was referred to. This is one of the abstruse 

 parts of the subject. In the matter of a footstep for an 



