460 ^ew Frigorific Mixture. 



To Mr. Matthew Shepperson, for the best Drawing from the 

 Antique, the Silver Medal. 



To Mr, Wm. Behnes, for the best Model from the Antique, the 

 Silver Medal. 



The General Assembly afterwards proceeded to elect and no- 

 minate the Officers for the year ensuing, when 



Benjamin West, Esq. was unanimously re-chosen President. 



New Council — A. E, Chalon, W. Mulready, T. Phillips, and 

 M. Shee, Esqrs. 



Old Couneil — Wm. Owen, J. Northcote, Esqrs., Sir William 

 Beechey, and H. Fuseli, Esq. 



Visitors in the Painting School — Sir W. Beechey, Sir T. Law- 

 rence ; J. Northcote, J. Ward, A. W. Callicot, H. Howard, W. 

 Owen, and T. Phillips, Esqrs. 



Visitors in the Life Academy — Sir W. Beechey; W. Mulready, 

 W. Owen, R. Smirke, H. Thomson, J, Flaxman, H. Howard, 

 T. Stothard, and R. Westmacott, Esqrs. 



Auditors re-elected — G. Dance and J. Farington, Esqrs. 



XCVL Intelligence and Miscellaneous Articles. 



NEW FRIGORIFIC MIXTURE. 



To Mr. Tilloch. 



Sir, — XAMONG the numerous mixtures which are attended 

 with a diminution of sensible heat, a very convenient and effec- 

 tive one seems to have hitherto escaped the attention of che- 

 mists. It is that of snow and alcohol. The greatest effect appeai-s 

 to take place when equal weights of each are used, and I need 

 scarcely add, that the precaution of effecting the solution in the 

 least possible time is necessary to produce the maximum of cold. 



The temperature both of the snow and alcohol being 32", the 

 solution in several experiments fell to — 17", amounting to 

 49^ of Fahrenheit. The alcohol was not of a very low specific 

 gravity, so that 1 imagine it would not be difficult to produce at 

 least an additional degree. The original communication not 

 having reached you, and no memorandum having been preserved, 

 I cannot now state what its strength was, nor does the season as 

 yet admit of a repetition of the experiment; since the difference 

 in the solubility of pounded ice and of snow will sensibly affect 

 the results. 



You will perceive that this circumstance explains the greater 

 degree of cold generated by mixing snow with our strong wines, 

 than by plunging the containing vessel into ice and water. 



I am, sir. Your obedient servant, 

 Blackheath, Dec. 1816. J. MacCulloch. 



I 



