frequent impurities
51Chemical warfare — For other uses, see Chemical warfare (disambiguation). This article forms part of the series Chemical agents Lethal agents Blood agents Cyanogen chloride (CK) …
52Coconut — For other uses, see Coconut (disambiguation). Coconut Palm Cocos nucifera Coconut Palm (Cocos nucifera) Scientific classification Kingdom …
53History of the Caribbean — The history of the Caribbean reveals the significant role the region played in the colonial struggles of the European powers since the fifteenth century. In the twentieth century the Caribbean was again important during World War II, in the… …
54William Murdoch — Infobox Scientist name = William Murdoch box width = image width = caption = birth date = Birth date|1754|08|21 birth place = Cumnock, East Ayrshire, Scotland death date = dda|1839|11|15|1754|08|21 death place = Handsworth, nr. Birmingham,… …
55Pharisees — The word Pharisees (lat. pharisæ|us , i ) comes from the Hebrew פרושים perushim from פרוש parush , meaning separated [Ernest Klein Comprehensive Etymological Dictionary of the Hebrew Language ] . The Pharisees were, depending on the time, a… …
56Forensic engineering — is the investigation of materials, products, structures or components that fail or do not operate/function as intended, causing personal injury or damage to property. The consequences of failure are dealt by the law of product liability. The… …
57Omar Khayyám — Khayyam redirects here. For other uses, see Khayyam (disambiguation). Omar Khayyám عمر خیام A depiction of Omar Khayyám, in the works of Edward FitzGerald Full name Omar Khayyám عمر خیام …
58Travertine — is a sedimentary rock. It is a natural chemical precipitate of carbonate minerals; typically Aragonite, but often recrystallized to or primarily Calcite. Basically, calcium carbonate is deposited from the water of mineral springs or rivulets… …
59Ludlow massacre — The Ludlow massacre refers to the violent deaths of 20 people, 11 of them children, during an attack by the Colorado National Guard on a tent colony of 1,200 striking coal miners and their families at Ludlow, Colorado in the U.S. on April 20,… …
60Frankincense — from Yemen Frankincense, also called olibanum (Hebrew: לבונה, levonah; Arabic: لُبَّانٌ, lubbān; Armenian: խունկ, khunk), is an aromatic resin obtained from trees of the genus Boswellia, particularly Bo …
