Excerpt from Comparison of Oxidation and Reduction Methods in the Determination of Forms of Sulfur in Coal Stopcock 1 (fig. 1) is Opened fully. Stopcock 2 is Opened gradually until a vigorous bubbling of nitrogen through the cadmium sulfate solution is established. The tank pressure is regulated to maintain atmospheric pressure in the system, as is evidenced by the level of mercury in the blow-by tube. With the contents of the flask still being stirred and cooled in the ice bath, a 50 - ml portion of water is added very slowly through the serum cap from a syringe. After the first 5 ml have been added drop by drop from a small needle, the reaction in the flask subsides sufficiently to allow the rest of the water to be introduced more conveniently from a larger needle. A 50-ml volume of 30 percent hydrochloric acid is then added through the serum cap. 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.