colourless glass
51David Grose — David Frederick Grose (* 21. November 1944 in Faribault, Minnesota; † 13. Oktober 2004) war ein US amerikanischer Archäologe und Fachmann auf dem Gebiet der Erforschung des antiken Glases. Er studierte am St. Olaf College und der Harvard… …
52environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
53Timeline 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… …
54electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
55Metalloid —   13 14 15 16 17   2  B Boron …
56Chlorine trifluoride — Systematic name …
57albite — albitic /al bit ik/, adj. /al buyt/, n. Mineral. the sodium end member of the plagioclase feldspar group, light colored and found in alkalic igneous rocks. [1835 45; < L alb(us) white + ITE1] * * * Common feldspar mineral, a sodium… …
58Muscovite — /mus keuh vuyt /, n. 1. a native or inhabitant of Moscow. 2. a native or inhabitant of the Grand Duchy of Muscovy. 3. (l.c.) Mineral. common light colored mica, essentially KAl3Si3O10(OH)2, used as an electrical insulator. 4. Archaic. a Russian.… …
59polymer — /pol euh meuhr/, n. Chem. 1. a compound of high molecular weight derived either by the addition of many smaller molecules, as polyethylene, or by the condensation of many smaller molecules with the elimination of water, alcohol, or the like, as… …
60printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …
