Excerpt from The Occurrence and Distribution of Nitrates and Nitrites in Food, Feces and Urine In 1847 Felouze made use of the reaction between ferrous chloride and hydrochloric acid in the presence of nitric acid or the salts of nitric acid. These substances when heated together react with the formation of nitric Od6 and an oxidation of the ferrous chloride to ferric chloride, This method marks the real beginning of chemical methods for the determination of nitric acid and a short description of the Felouze mode of procedure is of interest. Felouze made up a solution of potassium per-manganate and determined its factor by means of piano Wire dissolved in hydrochloric asid in the absence of air. He then placed a weighed amount of this iron Wire ii a flask, added hydrochloric acid. 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 technology 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.