cast-iron mold
91Wallace fountain — Wallace fountains are public drinking fountains that appear in the form of small cast iron sculptures scattered throughout the city of Paris, France. mainly along the most frequented sidewalks. They are named after the Englishman Richard Wallace …
92Cylinder head porting — refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve the quality and quantity of the air flow. Cylinder heads, as manufactured, are usually suboptimal due to design and manufacturing… …
93piston and cylinder — In mechanical engineering, a sliding cylinder with a closed head (the piston) that moves up and down (or back and forth) in a slightly larger cylindrical chamber (the cylinder) by or against pressure of a fluid, as in an engine or pump. The… …
94mercury processing — Introduction preparation of the ore for use in various products. Mercury (Hg) has a unique combination of physical properties. Its low melting point (−38.87° C [−38° F]) and boiling point (356.9° C [674° F]), high specific gravity (13 …
95nitrogen group element — ▪ chemical elements Introduction any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …
96Bessemer , Sir Henry — (1813–1898) British inventor and engineer Bessemer was the son of a mechanical engineer who had fled from the French Revolution. After leaving the village school in Charlton, where he was born, he worked as a type caster, until the family moved… …
97Crown Fountain — spouting water on visitors Artist Jaume Plensa …
98Modern architecture — This article is about architectural aspects of modernization and modernism. For most recent developments in architecture, see Contemporary architecture. Contrasts in modern architecture, as shown by adjacent high rises in Chicago, Illinois. IBM… …
99Penfield Reef Light — Infobox Lighthouse caption = 1913 postcard picturing the lighthouse location = Fairfield, Connecticut coordinates = coord|41.1163|N|73.2218|W|type:landmark region:US|name=Penfield Reef Light|display=inline,title yearbuilt = 1874 yearlit = 1874… …
100History of printing — The history of printing began as an attempt to make easier and reduce the cost of reproducing multiple copies of documents, fabrics, wall papers and so on. Printing streamlined the process of communication, and contributed to the development of… …
