Mr. Hatchett's Analysis of 
§ II. PROPERTIES OF THE WHITE PRECIPITATE. 
A. 
It is of a pure white, and is not extremely heavy. 
It has scarcely any perceptible flavour, nor does it appear to 
be soluble in boiling water; when, however, some of the powder 
is placed upon litmus paper moistened with distilled water, the 
paper in a few minutes evidently becomes red. 
B. 
1. When examined by the blow-pipe, it is not fusible per se 
in a spoon of platina, nor upon charcoal, but only becomes of a 
less brilliant white. 
2. Borax does not appear to act upon it; for the white par- 
ticles are only dispersed throughout the globule. 
3. It produces an effervescence when fused with carbonate of 
soda, and forms a colourless salt ; but, if too much of it be 
added, then the mass, when cold, appears like a white opaque 
enamel. 
4. When carbonate of potash is employed, the effects are 
similar in every respect to those of soda ; and it may here be 
remarked, that the saline combinations thus formed with soda, 
or potash, are soluble in Water ; and that these solutions have 
the same properties as that which was formed when the ore 
was decomposed by an alkali. The portion of the white preci- 
pitate which may be in excess, subsides unaltered, when the 
globules are dissolved in water. 
5. Phosphate of ammonia produces a very marked effect; 
for, when melted in a platina spoon, if some of the white sub- 
stance be added, a considerable effervescence takes place, and 
the two substances rapidly unite. The globule, when cold, is 
