for some lead materials in certain situations. In Section 17 states: "All Joints in cast Iron soil pipe shall be packed with picked oakum and run with molten lead well caulked. All connections of lead with iron pipe must be made with a brass ferrule of the same size as the lead pipe and caulked into the iron pipe as specified for cast iron pipe and connected to with the lead pipe with a wiped joint" In 1884 Dr. Roger S. Tracy wrote "Hand-Book of Sanitary Information for Householders" which was published by D. Appleton and Company. The book contains "Facts and Suggestions about Ventilation, Drainage, Care of Contagious Diseases, Disinfection, Food, and Water". Dr. Tracy was the Sanitary Inspector of the New York City Health Department. The book is divided into five chapters and Chapter II is on "Drainage". Chapter II is the largest chapter at 45 pages and includes "Plumbing Regulations of the New York City Board of Health". On page 25 Dr. Tracy presents a "plan of construction" that was recommended by the Board of Health but no date is provided and it is not stated whether the city adopted this proposal or not. The Board of Health's plan consisted of 57 Sections covering many elements of a plumbing code. For example Section 1 states: "All materials must be of good quality and free of defects; the work must be executed in a thorough and workmanlike manner" and Section 9 requires that house-drains be made of iron with a "fall of at least one quarter of an inch to the foot, if possible, and not more than one inch to the foot". The City of San Francisco would latter require that plumbing inspectors pass an examination based upon Dr. Tracy's book. As early as the 1920'S there were widespread complaints in the construction industry, about inconsistency in the way building codes were being implemented. In 1920 the Senate Select Committee on Reconstruction and Production concluded: "The building codes of the country have not been developed upon scientific data, but rather on compromises; they are not uniform in principle and in many instances involve an additional cost of construction without assuring most useful or more durable buildings. Two years later, the newly appointed Secretary of Commerce Herbert Hoover reported to Congress that conflicting building codes were increasing construction costs by 10 to 20 percent. Secretary Hoover appointed a