flat-bottom furnace
71Fourcault process — The Fourcault Process is a method of manufacturing flat glass. First developed in Belgium by Emile Fourcault, the process was used globally. Fourcault is an example of a vertical draw process, in that the glass is drawn against gravity in an… …
72Column — For other uses, see Column (disambiguation). National Capitol Columns at the United States National Arboretum in Washington, D.C …
73Solar cooker — A solar oven or solar cooker is a device which uses sunlight as its energy source. Because they use no fuel and they cost nothing to run, humanitarian organizations are promoting their use worldwide to help slow deforestation and desertification …
74Heat exchanger — An interchangeable plate heat exchanger Tubular heat exchan …
75Fort Niagara — Youngstown, New York Fort Niagara 1728 Type Trading Post …
76Industrial Review — ▪ 1994 Introduction The period since 1990 was proving a difficult time for the older industrialized economies, which had suffered from prolonged recession at home, and also for the previously centrally planned economies of Eastern Europe… …
77Water wheel — This article is about the machine for converting energy of flowing or falling water. For paddle wheels used to propel watercraft, see paddle wheel ship. For wheels used solely to lift water, see Noria. For factories or industries driven by water… …
78Drywall — For the musical group, see Drywall (musical project). Vertically hung drywall with joint compound. Drywall, also known as plasterboard, wallboard or gypsum board is a panel made of gypsum plaster pressed between two thick sheets of paper. It is… …
79Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… …
80Moraine State Park — Pennsylvania State Park Natural Monument (IUCN III) …
