Hollow Tile was originally designed to protect and fire- proof steel skeleton buildings. During the past ten years, it has gradually come into general use not as a fire proofing material only, but also for the construction of low cost walls and floors for skyscrapers, residences, apartment houses, farm buildings, school houses, factories, garages, etc. It effectively fulfills the demand for easily erected enduring masonry construction at minimum initial and maintenance cost. The company has always kept abreast of these changes, and today stands foremost among the clay companies of the world, while the name “NATCO” is synonymous with progress and quality in the hollow tile industry. DARLINGTON BRICK AND MINING COMPANY The Darlington Brick and Mining Co. was incorporated under the laws of the State of Pennsylvania on May 5, 1900, with an authorized capitalization of $100,000. A plant was immediately built, which is located at Darlington, Beaver County, and the company has established a repu- tation for the highest quality of grey and cream Face Brick made in the United States. These brick are produced in three textures: Smooth, Rug or Vertical Score, and De- vonshire or Mat texture. The company’s yearly output is 12,000,000 brick, and they are shipped to all parts of the United States, going as far South as Tampa, Florida, into Western Texas, into the Dakotas, and on the Eastern coast as far as Maine. The brick produced by the Darlington Brick and Min- ing Co., are especially suitable for high-grade residences, churches, school houses, apartment houses, banks and other public buildings.