In this booklet will be found details of many forms of clay manufactures, in which the Pittsburgh District excels, and statistics of various corporations and firms engaged in the clay industry. AMERICAN VITRIFIED PRODUCTS CO. Was incorporated in February, 1900, under the laws of New Jersey as the American Clay Manufacturing Co. In February, 1901, the name was changed to the American Sewer Pipe Co., and again changed in August, 1919, to the present title. The present company is a consolidation of thirty-two vitrified drain pipe and two paving brick plants. [t owns and operates twenty-six manufacturing plants located in Akron, Barberton, East Liverpool and Lisbon, 0., Brazil, Ind., Jackson and Grand Lodge, Mich. It also owns large deposits of clay in Ohio, Indiana, Michigan, Pennsylvania and West Virginia, also coal lands in Toronto, Lisbon and Uhrichsville, O., New Brighton, Pa., and New Cumberland, W. Va. It maintains distributing stations in Akron, Cleveland, Columbus, Detroit and New York. It also owns the entire capital stock of Michigan Sewer Pipe Co. ($10,000) operating three distributing yards in Detroit, the Akron Sewer Pipe Co. ($10,000) operating three distributing yards in Cleveland, and the American Sewer Pipe Co. of New York ($1,000) operating three dis- tributing yards in New York City. The annual output is approximately 15,000 carloads. The authorized capital stock of the American Vitrified Products Co. consists of $5,500,000 common and $2,000,000 7% cumulative convertible preferred of which there is outstanding $8,500,000 common and $1,750,000 preferred. The common stock has a par value of $50.00 and the pre- ferred $100.00. The company has no funded debt. The general offices of the company are at 15 Broad St., Akron, Ohio, and their Pittsburgh Office is at 1427 Oliver Building. The officers of the company are George R. Hill, Pres., Akron, O.; F. W. Walker, Vice-Pres., Beaver Falls, Pa.: F. B. Theiss, Vice-Pres.; A. S. McCombe, Secretary and