646 THANSACTIONS OF THE 



from their moulds. He supposes that accident to resemble the 

 well known Prince Rupert's drop. No doubt it is so. 



Mr. Sibley, an experienced founder, adverted to the practice of 

 covering and uncovering cooling castings, as of some value. Soft 

 iron wastes most in the furnace. 



Mr. Butler called to notice the centrifugal casting of pipes by 

 having the mould perfectly horizontal, and made to rotate with 

 high velocity when the melted iron is admitted in quantity ade- 

 quate to the formation of a pipe — that in theory — this centrifugal 

 force will distribute all the melted iron with precision in the 

 mold. 



Mr. Cohen had noticed this experiment in Baltimore. It was 

 of doubtful value. 



Mr. Butler moved that Mr. ^Mott be requested to prepare a 

 paper on iron castings, for the volume of Transactions. Carried 

 unanimously. 



Mr. Devyr exhibited and explained his invention for placing 

 coal barges in a strong cradle, Avhich is drawn out of water on to 

 a coal yard, and at a suitable spot roiled over so as to drop all the 

 coal at once, instead of keeping the barge two days to discharge 

 her cargo, as now required. The cradle is to be strong enough, 

 and inclosed in circles, so as to roll over very readily, and keep 

 the barge from injury by straining. 



The committee on questions, give for the subject at the next 

 meeting, " Steam-plows." 



The Club then adjourned. H. MEIGS, Secretary. 



January 13, 1858. 



Present — Messrs. Pell, Tillman, Fisher, Leonard, and others — 

 fifteen members. 



The regular chairman, Thos. B. Stillman being absent, Mr. Pell 

 took the chair. H. Meigs, Secretary. 



The Secretary stated that we were indebted to London for gra- 

 tuitous copies of the Journal of one of the greatest institutions of 

 the world, viz : The London Society of Arts, which has associ- 

 ated with it 350 societies, thus having the enormous advantage 

 of this vast amount of thought and experience. 



