54 Proceedings of Philosophical Societies. [July, 



Mr. Edivard Roberts's Chum. — This churn has two agitators 

 within it, and will be found to separate the butyraceous parts of 

 the cream with great facility. The sum of five guineas was 

 voted to Mr. Roberts for this contrivance. 



Mr. Aloys Senej elder's Treatise on Lithography. — Mr. Sene- 

 felder was the original inventor of this valuable ait, and his 

 treatise contains the history and results of his discoveries with 

 numerous recipes for making the inks, crayons, machines, and 

 Other apparatus, necessary in the process. The Society awarded 

 its gold medal to Mr. Senefelder, as a testimony of its sense of 

 his useful labours. 



Mr. D. Redman's Specimen of Lithography upon English 

 Stone. — The silver Isis medal was voted to Mr. "Redman for this 

 specimen. 



Mr. C. Hudmandcl's Specimens of Lithography executed upon 

 Foreign Stones. — The Society voted its silver medal to Mr. Hul- 

 mandel, for his masterly performances in this art. 



Mr. Hinning's Restorations and Casts of the Friezes in the 

 British Museum. — The Society awarded its gold lsis medal to 

 Mr. Hinning for this laborious performance. 



Mr. J. White's Double Door Spring. — This invention is for 

 the purpose of permitting the doors to open both ways, and yet 

 to retain them when shut, with sufficient firmness. The Society 

 adjudged its silver Isis medal to Mr. White for his invention, 



Lieut. T. Cook's Life-Raft. — This valuable apparatus can be 

 made in a very short time, from materials always on board ship, 

 or it may be kept in a very portable form, always ready for use ; 

 and may prove the means of" saving many lives in case of ship- 

 wreck. The Society voted its gold metal for this invention. 



Mr. Brabazon's Roic-Lock. — This is an improved mode of 

 supporting the oars in boats, and particularly in life-boats ; and 

 for this contrivance, the Society awarded its silver medal. 



Mr. J. Young's British Opium. — Mr. Young has considerably 

 improved the method of collecting this valuable medicine ; and 

 has proved that it may be procured in this country with sufficient 

 profit to induce the agriculturist to cultivate the poppy for this 

 purpose, as well as to extract oil from its seeds. The Society 

 adjudged its gold medal to Mr. Young for this improve- 

 ment. 



Mr. Aust's Circular Pump. — In this pump, the barrel and 

 pump rod are made circular, and the latter forms one piece with 

 the handle, which, turning upon an axis in the centre of the circle, 

 there is nothing to disturb the circular motion of the piston in the 

 barrel, and the pump becomes exceedingly simple, consists of 

 but few parts, and can consequently be made cheap. The sum 

 of 20 guineas was voted to Mr. Aust for this contrivance. 



Mr. W. Russell's Lock-Cock. — The handle of this cock cannot 

 be turned, until a stud screwed into the side of it is unscrewed 

 by means of a key applied to it ; in some cases Mr. Russell 

 applies a Bramah's lock to this purpose, and the cock, therefore, 



