This is the diagnostic hook the company used to recruit new buyers, quoted verbatim by Samuel Hopkins Adams from a Swamp Root circular under the heading “HOW TO FIND OUT.” Adams’s rebuttal is immediate and factual: it usually indicates nothing of the sort, he wrote, since all urine deposits a sediment after standing twenty-four hours. He reports that a U.S. Post Office inspector tested the company’s related offer to analyze mailed-in urine samples and diagnose kidney disease by mail: samples of weak tea and horse urine, sent from different towns under assumed names, each came back with an “analysis” reporting a dangerous kidney condition and a recommendation to take Swamp Root; on inspecting the Binghamton premises, the inspector found the “laboratory” was a single room where a young clerk — “not a qualified chemist” — processed the responses from form letters. This is a mechanism-only claim (a purported diagnostic test, not a treatment mechanism) and is refuted both on basic physiology (sediment is a normal property of standing urine, not a kidney-disease indicator) and by direct contemporaneous investigation showing the “analysis” was fabricated regardless of the sample submitted.