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Excerpt from The Occurrence and Distribution of Nitrates and Nitrites in Food, Feces and Urine By this system, we get back to the time when chemical analysis depended upon some physical property and results were purely arbritrary. We find in 1775 for example, that is, at the time when the manufacture of gunpowder and the refining of saltpeter was taken up by the French government, that the method in use could hardly be called a chemical one, The saltpeter to be tested was placed in an iron spoon, heated to redness, and the relative amounts of salt and saltpeter present were arrived at from the intensity of the deflagration. That resu ts obtained in this way were unsatisfactoy is apparent. 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.









