Page:Transactions of the Geological Society, 1st series, vol. 1.djvu/249

 phosphat became slightly brownish during the calcination, owing to the presence of a few particles of iron, the quantity of which was too minute to be ascertained.

§ XIII. Precipitation of the sulphuric and muriatic Acids, with a view to ascertain their Quantity.

Before drawing any ultimate conclusion respecting the contents of the water and the proportions of its ingredients, I found it necessary to ascertain the quantities of sulphuric and muriatic acids which it contained, in order to enable me to try how far these quantities might coincide with the conclusions obtained by the separation of