468 Scientific Intelligence. [Dec. 
Alloy; and‘of an Instrument termed the Shifting Cartridge. | By 
Mr. W. Chinalls. 
14, Observations on the Scilly Islands. By Henry Boase, Esq. 
15. An Account of Silver Mines in general, and of those in 
Cornwall in particular. By Joseph Carne, Esq. 
16. On the Lime-stone at Veryan. By Samuel Trist, Esq. 
17. An Account of the Produce of the Copper Mines in Corn- 
wall, Devonshire, Anglesey, North Wales, and Ireland, in Ore, 
Copper, and Money, for the Year ending the 30th of June, 1815, 
and of Tin raised in Cornwall, inthe Year ending with Midsummer 
Coinage, 1815. By Joseph Carne, Esq. 1 
At the Anniversary Meeting, October 10, 1815, the Right 
Honourable Lord De Dunstanville, &c. Vice Patron, in the Chair, 
the Report of the Council being read, it was resolved, That it be 
printed and circulated.—That the Museum of the Society be in- 
vested in the following Trustees: Lord De Dunstanville, Vice 
Patron; Lord Viscount Falmouth; Sir William Lemon, Bart.; 
Sir Rose Price, Bart. ; Davies Giddy, Esq. M. P. President. 
Lord. De Dunstanville communicated to the Society, that Dr. 
Paris had been introduced to his Royal Highness the Prince Regent, 
the Patron, in order to present him with a Report of the Society, 
and that he had been most graciously received. 
Thanks were voted to those Gentlemen who had contributed to 
the cabinet and library; to the authors of the different memoirs 
read before the Society; to Mr. Chinalls, and the other mine 
agents, who have exerted themselves in introducing the alloyed 
tamping bar; to John Ayrton Paris, M.D. for the zeal and ability 
with which he has conducted the Society, and for his Course of 
Lectures on Chemistry delivered before them last winter. 
Sir Rose Price Bart. as the representative of those Gentlemen 
who had attended the Lectures, stated that he rose for the purpose 
of presenting Dr. Paris with a piece of plate, of 50 guineas value, as 
a small testimony of their esteem and regard. 
It was further resolved, That a medal with an appropriate device 
be immediately struck, and presented to those miners who had con- 
tributed practical information to the Society, or who had by their 
exertions promoted its views. 
VI. Prussic Acid. 
A most important set of experiments on prussic acid has beer 
jately: made by M. Gay-Lussac. I shall lay the whole of them 
before my readers as soon as I can find room for their insertion. Ia 
the mean time I shall give a sketch of the results which he ob- 
tained, by way of notice, that I may satisfy the impatience of 
British chemists, and enable them to examine the curious substances 
which Gay-Lussac has discovered. 
Prussic acid may be obtained by putting dry prussiate of mey- 
eury intoa tubulated retort, pouring upon it muriatic acid in quan- 
tity not sufficient to decompose the whole prifsiate, and applying a 
4 
