Saltpetre
41Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …
42Early thermal weapons — were devices or substances used in warfare during the classical and medieval periods (approx 8th century BC until the mid 16th century AD) which used heat or burning action to destroy or damage enemy personnel, fortifications or territories.… …
43alchemy — alchemic /al kem ik/, alchemical, alchemistic /al keuh mis tik/, alchemistical, adj. alchemically, adv. /al keuh mee/, n., pl. alchemies for 2. 1. a form of chemistry and speculative philosophy practiced in the Middle Ages and the Renaissance and …
44chile — /chil ee/, n. chili. * * * Chile Introduction Chile Background: A three year old Marxist government was overthrown in 1973 by a dictatorial military regime led by Augusto PINOCHET, who ruled until a freely elected president was installed in 1990 …
45Chile — Chilean, adj., n. /chil ee/; Sp. /chee le/, n. a republic in SW South America, on the Pacific Coast. 14,508,168; 286,396 sq. mi. (741,765 sq. km). Cap.: Santiago. * * * Chile Introduction Chile Background: A three year old Marxist government was… …
46Honourable East India Company — Infobox Defunct Company company name = East India Company company slogan = fate = Dissolved and activities absorbed by Crown successor = foundation = 1600 defunct = 1858 (formally dissolved in 1873) location = London industry = key people =… …
47Potassium nitrate — Potassium nitrate[1] …
48Timeline of Islamic science and engineering — This timeline of Islamic science and engineering covers the general development of science and technology in the Islamic world during the Islamic Golden Age, usually dated from the 7th to 16th centuries.From the 17th century onwards, the advances …
49explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… …
50Wujing Zongyao — The Wujing Zongyao (Zh cpwl|c=武经总要|p= Wǔjīng Zǒngyào |w= Wu Ching Tsung Yao |l=Collection of the Most Important Military Techniques) was a Chinese military compendium written in 1044 AD, during the Northern Song Dynasty. Its authors were the… …
