White Copper. — Carburets of Hydrogen. 73 



cautionary measure. None of the substances used appear 

 to be sufficient, either singly or conjointly, without the wax, to 

 preserve the body, or convert it into a perfect mummy : and 

 one of the nates, having been wholly deprived of the wax by 

 ebullition and maceration, looked no longer like its mummified 

 fellow, but resembled a preparation of a recent specimen of 

 that part, and soon began to putrefy. After the readings of 

 the paper. Dr. Granville exhibited the dissected mummy and 

 its various parts, together with the bandages with which it had 

 been invested, drawings of its outer case, &c., and his own 

 imitative preparations, in the Society's library; thus illus- 

 trating the details of his communication. 



WHITE COPPER. 



M. Frick, a German chemist, has formed several alloys in 

 iniitation of white copper, or the Pahfong of the Chinese. A 

 mixture in the following proportions — 



Copper . . . .41-75 



Nickel .... 32-25 



Zinc 26-00 



composed a grayish alloy, very little malleable when cold, 

 not at all when heated ; flattening with difficulty. Another 

 according to this formula — 



Copper .... 50-00 



Zinc 31-25 



Nickel .... 18-75 

 jiroduced a white metal susceptible of a beautiful polish, easily 

 flattened, malleable when cold, unalterable by the atmosphere, 

 and sonorous like silver. A third alloy, formed as follows— 



Copper .... 53-39 



Zinc 29-13 



Nickel . . . .17 48 

 approached still nearer to silver in colour and sound. It was 

 harder than that metal, very tenacious, but also exceedingly 

 ductile. Its sp. gr. was at 15°,4 of Reaum. 8:556.~Biillet. 

 Univers.* 



iMR. FARADAY ON NEW COMPOUNDS OF CARBON AND HYDROGEN. 



A paper was conmiunicated to die Royal Society, June 16, 

 On some new compounds of carbon and hydrogen, and on 

 certani other products obtained during the decomposition of 

 oil by heat, by Mr. M. Faraday, F.R.S. 



The experiments, of which the results are detailed in this 

 paper, were made principally on the fluid, which is found to 

 be deposited in considerable (juantity, when oil gas is com- 



.,_ , * 'See Phil. Mag. vol. ixiii. n. 111). 



Vol. 66. No. 327. Julj/ 182 5. K pressed. 



