Intelligence and Miscellaneous Articles. 481 



which occur in the paste. A portion of the mass being dried and 

 pulverized, was exposed to the air in a warm chamber, until it ceased 

 to lose weight. In this state kinate of lead consists of an atom of 

 acid 180, 1 of oxide 112, and 2 of water 18 = 310. 



Sub-kinate of Lead may be prepared by mixing kinate of soda, or 

 preferably of ammonia, with subacetate of lead. As it is soluble in 

 excess of subacetate of lead, it is better to stop before precipitation 

 entirely ceases. This salt has a great tendency to combine with 

 carbonic acid by mere exposure to the air; it ought to be kept from 

 it, pressed between folds of blotting-paper, and dried under the re- 

 ceiver of the air-pump over lime or sulphuric acid, and afterwards 

 heated, if required for analysis. Its composition when dry is, acid 

 180, oxide 4fc0; if it were a tetra-kinate the oxide would be 4-48. 

 It is not easy to reduce this to an atomic constitution. 



Kinate of Silver. — A solution of kinate of silver, evaporated in 

 the dark with a very gentle heat, or at common temperatures, under 

 the receiver of the air-pump, gave in both cases a very white an- 

 hydrous salt, of a spherical or mammillated form. When heated, 

 it soon fuses, swells, and leaves (after giving abundant white va- 

 pours) silver in the metallic state. It is composed of acid 180, 

 and oxide 116; undoubtedly an atom of each. 



Kinate of Cinchonia is soluble in half its weight of water at about 

 60°. It contains 4 atoms of water of crystallization ; it is partially 

 decomposed by alcohol. If it be dissolved with heat in a quantity 

 of alcohol which is insufficient to hold it in solution when cold, a 

 salt is deposited in colourless brilliant crystals, which are short 

 compressed prisms, with four or six facets, and obliquely truncated. 

 They appear to be unalterable in the air, or by a slight degree of 

 heat. After a long time these crystals become perfectly opake. 



Kinate of Quina.— This salt also contains 4 atoms of water of 

 crystallization. It is soluble in 3J parts of water at 50°, and in 8-88 

 parts of alcohol at the same temperature. — Ann. de Chim. et de 

 Phys. torn. li. p. 56. 



ANALYSIS OF ASPARAGIN, AND ASPARTIC ACID. 



MM. Boutron and Chalard have analysed the above substances 

 by means of combustion with oxide of copper: a gaseous mixture 

 was obtained, in which the azote and carbonic acid were to each 

 other as 1 to 4. The ultimate result gives, as the composition of 

 asparagin, 



Carbon 8 atoms 611 -504 39*060 



Hydrogen.... 16 do. 98-836 .... 6-377 



Azote 4 do. 354-072 .... 22610 



Oxygen..... 5 do. 500000 .... 31'953 



JOO-000 

 When crystallized, it contains 1258 per cent, of water, equivalent 

 to two atoms. 



The aspartic acid analysed was obtained by boiling barytes water 

 in excess with asparagin, until the evolution of ammonia had for 



Third Series. Vol.2. No. 12. June\8SS. 3Q 



