480 Intelligence and Miscellaneous Articles. 



centrated solution to spontaneous evaporation. This salt is not 

 bitter when pure; it dissolves in half its weight of water at 60°. 



M. Baup could not obtain crystallized kinate of potash or am- 

 monia, either neutral or acid. 



Kinate of Lime is composed of an atom of acid 180, 1 of lime 28, 

 and 10 of water 90 = 298. This salt exists naturally in some kinds 

 of cinchona in considerable quantity. It is unalterable by expo- 

 sure to the air. It crystallizes in rhombic laminae of about 78° and 

 112°. These sometimes become hexagonal by the replacement of 

 the two acute angles. These crystals are easily divisible into bril- 

 liant leaves. Kinate of lime dissolves in 6 parts of water at 62° ; its 

 solubility is greatly dependent upon temperature. 



Kinate of Strontia. — This salt is composed of an atom of acid 

 180, 1 of strontia 52, and 10 of water 90 = 322. It effloresces 

 quickly by exposure to the air. It is soluble in 2 parts of water 

 at 54°. 



Kinate qfBarytes. — This salt may be prepared by adding car- 

 bonate of bary tes to the acid. It is composed of an atom of acid 

 180, 1 of barytes 76, and 6 of water 54 = 310. It crystallizes in 

 acute triangular dodecahedrons. It does not effloresce by exposure 

 to the air. 



Bi-kinate of Copper. — Hitherto two distinct salts have been con- 

 founded under the name of Kinate of Copper. One is a bi-kinate, 

 and the other a sub -kinate; the former is prepared by putting car- 

 bonate or oxide of copper into kinic acid, taking care that the acid 

 is sensibly in excess ; if during evaporation a greenish salt should 

 deposit, it ought to be immediately separated. By cooling, or by 

 the spontaneous evaporation of the solution, the bi-kinate crystal- 

 lizes. It is to be redissolved in water containing a little kinic acid, 

 and recrystallized. 



A solution of this kinate, made with cold water, soon decomposes; 

 this effect is accelerated by heat ; to avoid it, it is requisite to have 

 a slight excess of acid, which however increases the difficulty of 

 having a pure salt. Bi-kinate of copper is of a pale blue colour, 

 and in acicular crystals ; it effloresces in the air, and loses 2-5ths 

 of its water of crystallization. It dissolves in about 3 parts of water 

 at ordinary temperatures. It is composed of 2 atoms of acid 360, 

 1 of peroxide 80, and 10 of water 90. 



Sub- kinate of Copper. — This may be prepared by heating a weak 

 solution of kinic acid with excess of carbonate or peroxide of cop- 

 per ; or by the double decomposition of a kinate, with the acetate, 

 but not with the sulphate or nitrate of copper. 



This salt has the form of very small brilliant crystals ; its colour 

 is a fine green, which does not alter in the air. It is soluble in from 

 1 150 to 1200 parts of water at 60°. Boiling water dissolves a larger 

 quantity, which crystallizes on and after cooling. It is composed of 

 acid 57 931 ; oxide 27 586 ; water 14-483. It is difficultly reduci- 

 ble to any probable atomic constitution. 



Kinate of Lead.— This salt crystallizes only when the solution is 

 so concentrated that it is difficult to detach the acicular crystals 



