Standard methods for the examination of water and sewage

"Standard Methods for the Examination of Water and Sewage" by the American Public Health Association's Laboratory Section is an early twentieth-century scientific guide detailing the correct ways to test water and waste water. The book starts with a preface describing the committees that helped revise it and why it's so important to have clear rules for testing water. It explains how to take water samples, how much to collect, and why it's important to get a good, typical sample to test. The text then shifts to the importance of physical exams, including how to measure things like cloudiness and temperature, forming the start of a clear, thorough guide to getting trustworthy readings of water and waste water features.