Mr. Schmeisser's Account of a 
According to these experiments, 100 grains of the analyzed 
substance contains 30 grains of fixed air, 1 of calcareous, and 
68 grains of another earth, which may be called Strontion 
garth , and the remaining weight may be accounted for, from 
the substance which gives it the colour, and which I suggest, 
from comparative experiments, to be phosphate of iron and 
manganese ; the proportion of which 1 could not accurately 
ascertain, on account of the smallness of the specimen which I 
possessed, and which I employed for analysis ; but which I shall 
endeavour to ascertain by future experiments on a larger scale. 
In order to compare the nature of the substance with which 
it was accompanied to the before-mentioned substance, I made 
the following experiments. 
This substance was crystallized in six-sided prisms with py- 
ramids, colourless, semitransparent, rather opaque towards the 
basis, and less hard than the other substance; a certain quan- 
tity of it I reduced to fine powder, and submitted it to various 
experiments, by which I found that it contained barytes, cal- 
careous earth, and carbonic acid. 
One hundred grains of this substance were dissolved in ma- 
rine acid, during which 15 grains of carbonic acid were se- 
parated ; the solution was gently evaporated, and exposed to 
crystallize. The crystals were then exposed for some time 
to air in a funnel, during which part of the crystals had de- 
liquesced. When no more deliquescence was observed, the 
whole liquor was diluted with a sufficient quantity of distilled 
water, and diluted sulphuric acid was then added, by means of 
which 2 grains of barytes were separated. The filtered liquor 
was then decomposed by alkali, and 12 grains of calcareous 
earth were separated. The dry crystals remaining on the 
