GEATES. 67 



soluble in water. The solution is of a brown color, 

 according to its strength, from a light brown to a 

 deep coffee colour, almost black ; acids precipitate 

 this solution, and the geine falls in light brown flocks, 

 exceedingly bulky. This precipitate may be wash- 

 ed in water, rendered a little acid ; but simple water, 

 in consequence of the great solubility of geine, de- 

 veloped by its combination with alkali, will dissolve 

 nearly all the precipitate. 



2d. Lime water, added to a solution of an alka- 

 line geate, forms a precipitate of geate of lime. It 

 is to be observed, that a cautious and gradual addi- 

 tion of lime water forms a precipitate, which imme- 

 diately re-dissolves. This is soluble geate of lime. 

 It requires 2000 parts of water to dissolve it, being 

 a very little more soluble than geine itself, and only 

 half as soluble as lime alone. An excess of lime 

 water precipitates all the geine as insoluble geate of 

 lime. The properties of this insoluble geate of lime, 

 are, 



119. 1st. Almost perfect insolubility in water 

 and alkalies. 



2d. Decomposable by alkalies. 



120. Geate of magnesia is easily soluble in water. 

 It is the most soluble of all the earthy geates. It 

 requires only 160 parts of water to dissolve one of 



