Foreign Literature and Science. 371 



nausea, and violent head-ach. My eyes says Sig. G. beheld 

 things but indistinctly, and a deep murmuring sound was in my 

 ears. After a short time, all these effects ceased, except that 

 of heat, which increased in an alarming manner; but ultimate 

 ly by the abundant use of cold drinks I was restored to my 

 original state of health. — Giornaledi Fisica, viii. 295. 



4. Artificial Gold a new alloy* — The Hanoverian Mag^ 

 azine contains a description by M. Dittmer, of the following 

 compound of different metals, prepared by the privy coun- 

 sellor, Dr. Hermstadt, which may supply the place of gold, 

 not only as to color, but also for its specific gravity and duc- 

 tility. The materials consist of sixteen parts, by weight, of 

 pure platina, seven parts of copper, and one part of zinc, 

 equally pure ; these metals are to be mixed together in a 

 crucible, covered with powdered charcoal, and perfectly fu- 

 sed, so as to form a homogeneous mass. — Rev. Enc. xxvii. 

 900. 



5. Comparative analysis of the elastic Bitumen of Eng- 

 land and France, by M. Henry the younger. — The French 

 bitumen was found in October, 1816, by M. Oliver, in the 

 Montrelais, distant a few leagues from Angus, at the depth 

 of thirty fathoms, of ophiolite, mixed with veins of quartz 

 and carbonate of lime. 



Physical characters of the two bitumens. — 1 . That found 

 in Derbyshire is in brown or blackish masses, and lightly 

 translucent on the edges, and appears greenish by transmit- 

 ted light ; it is more or less elastic ; burns readily with a 

 white flame, and exhales a bituminous smell. Its specific 

 gravity varies from 0.9052, to 1.233. 



2. The French bitumen presents nearly similar charac- 

 ters ; its color is very deep blackish brown, it is opaque, in- 

 odorous, moderately compact, compressible, very tenacious, 

 and very elastic ; by transmitted light it is rather black than 

 greenish. It floats on water, and burns with a clear bluish 

 white flame, and a bituminous odor. The composition of 

 the two, according to M. Henry's analysis, is per cent. 



*The Franklin Journal contains an article entitled " Mosaiac Gold," ex- 

 tracted from the London Journal, giving a long account of this new alloy. 



