1602 Miscellaneous Intelligence. 



and which Berzelius considers as the deutoxide, is, according to 

 Dr. F. a compound of 1 atom of peroxide = 22.323 and 1 atom 

 of deutoxide = 77.677. — Annak of Phil. I., p. 50. 



2. Dissection of Crystals. — Those specimens of sulphuret of 

 antimony which are crystaHized in large crystals, crossing 

 each other, admirably illustrate Mr. Daniell's mode of dis- 

 playing crystalline texture by dissection. On introducing such 

 a piece of sulphuret into a portion of fused sulphuret and 

 contmuing the heat, it begins to melt down ; but so far from this 

 taking place uniformly at the surface, crystals will sometimes be 

 left more than half an inch long projecting from it ; and in other 

 places the cavities left by fused crystals will be so large and 

 have such perfect surfaces, that the angles they form with each 

 other may be readily ascertained. In order to observe these 

 effects it is only necessary to remove the half-fused piece of sul- 

 phuret from its hot bath, and allow it to cool. M. F. 



3. Solution of Lime. — Mr. Dalton formerly shewed that lime was 

 more soluble in cold water than in hot water, and gave a table of 

 quantities, from which he concluded, that the quantity held in 

 solution by water of 32° Fahr., was nearly twice that retained 

 by water of 212°. Mr. Phillips has lately taken up the subject, 

 and after ascertaining the accuracy of Mr. Dalton's experiments 

 and conclusions, proceeds to experiment and remark upon the 

 cause of the phsenomenon, and considers it as resulting "from 

 the effect which heat sometimes produces of increasing instead 

 of diminishing the attraction of cohesion. The affinities which 

 are brought into play, are the attraction of aggregation of the 

 particles of lime for each other, the attraction of the lime to form 

 a hydrate with a small portion of water, and the mutual affinity 

 existing between that hydrate and the water of solution," and at 

 the high temperature, Mr. Phillips thinks that the two former 

 affinities may be heightened so as to overpower the latter. 



Mr. P. found, that by heating cold saturated lime-water a 

 crystalline deposition of hydrate of lime was thrown down, but 

 the crystals were so minute that their form could not be ascer- 

 tained. 



10.000 gr. of water at 212° dissolve 7.8 gr. of lime. 

 10.000 gr. of water at 32° dissolve 15.2 gr. of lime. 



Annals of Phil. I. p. 107. 



4. Lithia in Lepidolite. — Professor Gmelin has detected li- 

 thia in two specimens of lepidolite ; one being Swedish, and the 

 other from Moravia. He endeavoured, without success, to form 

 alum with this alkali and the super-sulphate of alumine. 



