Excerpt from Sewage-Analysis: A Practical Treatise on the Examination of Sewage and Effluents From Sewage; Including Also a Chapter on Utilisation and Purification and a Preliminary Chapter
This book is one of a series of treatises on special applications of chemical analysis, the first of these treatises, which is now in its tenth edition, having been published so long ago as the month of May in the year 1868. The first of these books, the "Water-Analysis," although specially concerned with drinking-water and the recognition of the chemical differences between clean and unclean water, was not complete without some reference to sewage, which is a pre-eminently unclean, and a very common variety of water. Accordingly, so long ago as the year 1874, on the appearance of the third edition, there was a chapter on urine and sewage; and the ammonia method of sewage-analysis, described in that edition and all later editions of "Water-Analysis," has since come into general use.
The acceptance of a sound method of analysis, which is perhaps the only redeeming feature in the official or semiofficial analyses of sewages and sewage-effluents, and the only circumstance which saves them from utter futility, is deprived of much of its value and its power for good by reason of confusion of systems of numerical statement.
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