Excerpt from American Chemical Journal, 1882, Vol. 4 The precipitation of phosphoric with titanic acid by boiling an iron solution which had been reduced to the ferrous condition by sulphuretted hydrogen or sulphurous acid was first ticed by E. H. Bogardus in 1874/ Since that time, as far as we are aware, t much has been published on the relation of these two acids to each other, and to silicic acid in the ordinary course of analysis of iron ores. The following investigation may perhaps aid in clearing up some of the obscure points in the analysis of titaniferous ores. The Determination of Phosphorus. From two to five grams of the finely powdered ore arc weighed into a beaker and treated with about 50 cc. of hydrochloric acid (sp. gr. 1.12), evaporated to dryness, and heated in an air-bath for an hour to 1 io to 120 C. To the dry mass are added 50 cc. of hydrochloric acid (1.12), and the solution filtered off from the insoluble residue. On washing this residue with water the filtrate often runs through turbid. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art techlogy to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.