478 SEC. 13. CHEMISTRY. 



2409b. Apparatus, by M. Dumas, for ascertaining the 

 density of vapours. M. J. Dumas, Paris. 



2410. New Balance for a Laboratory. Deleuil, Paris. 



2411. Apparatus for rapidly saturating a small quantity of 

 a liquid with a gas. Rough model. George Gore, F.R.S. 



2412. Apparatus for rapidly saturating a small quantity of 

 a liquid with a gas. George Gore, F.R.S. 



2413. Apparatus for preparing small quantities of liquid car- 

 bonic acid gas, or liquid hydrochloric acid gas, and examining 

 its action upon various substances. George Gore, F.R.S. 



(Philosophical Transactions of the Royal Society, 1861, and Proceedings of 

 the Royal Society, May 1865.) 



2414. Apparatus for preparing small quantities of liquefied 

 cyanogen or liquefied ammonia gases, and examining their action 

 upon various substances. George Gore, F.R. S. 



(Proceedings of the Royal Society, Vol. 20, p. 67 ; also No. 141, 1873.) 



2415. Bod of Selenium, eight feet high, used in some ex- 

 periments upon light. George Gore, F.R. S. 



241 5 d. Seven different metal Wires of equal Strength 

 and Weight, for determining the Specific Gravity from 

 their length, by means of a scale. 



The Breslau Committee far Exhibition. 



241 5e. Appliances for testing Gold and Silver. 



All these objects date from the time of the first quarter of the 

 18th century, and are the property of His Highness Prince Pless, 

 of Furstenstein Castle. The Breslau Committee. 



2418. Press used by Dr. W. H. Wollaston, V.P.R.S., to 



compress Platina, obtained in a fine state of division from pre- 

 cipitated chloride. G. H. Wollaston. 

 By means of this press the force obtained when the handle is at an angle 

 of 5 is very nearly 60 x by power, and at an angle of 1 very nearly 300 x by 

 power. 



241 8a. Rhodium extracted from Platinum Ore by Dr. Wol- 

 laston, V.P.R.S. Probably also contains Iridium and Ruthenium. 

 G. H. Wollaston, Clifton, near Bristol. 



241 8b. Platinum Crucible and Platinum Trough, used 

 by Dr. Wollaston. G. H. Wollaston, Clifton, near Bristol. 



2419. One hundred and eleven vessels and articles of 

 Platinum (weight 117^ ounces), used in Researches on Anhy- 

 drous Hydrofluoric acid and the Fluorides. 



George Gore, F.R.S. 



2419a. Pure Fluorides in bottles of platinum, &c., used in 

 researches on the Fluorides. George Gore, F.R.S- 



