blast-furnace foundation
21National Register of Historic Places listings in Allegheny County, Pennsylvania — Location of Allegheny County in Pennsylvania This is a list of the National Register of Historic Places listings in Allegheny County, Pennsylvania. This is intended to be a complete list of the properties and districts on the National Register of …
22Colorado Fuel and Iron — The Colorado Fuel and Iron Company (CF I) was a large steel concern. By 1903, it was largely owned and controlled by John D. Rockefeller and Jay Gould s financial heirs.[1] While it came to control many plants throughout the country, its main… …
23Butterley Company — Infobox Company name = Butterley Engineering type = Ltd genre = foundation = 1790 founder = Benjamin Outram location city = location country = location = Ripley, Derbyshire locations = area served = key people = industry = Engineering, Oil,… …
24Technology of the Song Dynasty — The Song Dynasty ( zh. 宋朝; 960–1279 CE) provided some of the most significant technological advances in Chinese history, many of which came from talented statesmen drafted by the government through imperial examinations.The ingenuity of advanced… …
25Carbon dioxide — Carbon dioxide …
26Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
27Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …
28Window shutter hardware — Window Shutter Hardware> Overview A series of documents are provided here to further explain terms and terminology related to shutter hardware and blacksmithing, as well as the evolution of early hardware.A Brief History of Early Hardware In its… …
29Youngstown, Ohio — Youngstown redirects here. For other uses, see Youngstown (disambiguation). Coordinates: 41°5′47″N 80°38′57″W / 41.09639°N 80.64917°W …
30Helen Brach — Articleissues cleanup = July 2008 sections = November 2007 refimprove = July 2008 rewrite = July 2008Infobox Person name = Helen Brach caption = birth name = Helen Vorhees Brach birth date = birth date|1911|11|10|mf=y birth place = death date =… …
