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In 1915, when poison gas was relatively new, less than 3% of British gas casualties died. In 1916, the proportion of fatalities jumped to 17%. By 1918, the figure was back below 3%, though the total number of British gas casualties was now nine times the 1915 levels.
Highly Toxic: a gas that has a LC 50 in air of 200 ppm or less. [2] NFPA 704: Materials that, under emergency conditions, can cause serious or permanent injury are given a Health Hazard rating of 3. Their acute inhalation toxicity corresponds to those vapors or gases having LC 50 values greater than 1,000 ppm but less than or equal to 3,000 ppm ...
By the end of the war, poison-gas use had become widespread on both sides. By 1918, a quarter of artillery shells were filled with gas and Britain had produced around 25,400 tons of toxic chemicals. Britain used a range of poison gases, initially chlorine and later phosgene, diphosgene and mustard gas.
In 1923, Hans von Seeckt pointed the way, by suggesting that German poison gas research move in the direction of delivery by aircraft in support of mobile warfare. Also in 1923, at the behest of the German army, poison gas expert Dr. Hugo Stoltzenberg negotiated with the USSR to build a huge chemical weapons plant at Trotsk, on the Volga river.
Schummer, Joachim. "Ethics of chemical weapons research: Poison gas in World War One." Ethics of Chemistry: From Poison Gas to Climate Engineering (2021) pp. 55-83. online; Smith, Susan I. Toxic Exposures: Mustard Gas and the Health Consequences of World War II in the United States (Rutgers University Press, 2017) online book review
Cooper, Thomas Parsons. (1911) The History of the Castle of York, from its Foundation to the Current Day with an Account of the Building of Clifford's Tower. London: Elliot Stock. OCLC 4246355. Creighton, Oliver Hamilton. (2005) Castles and Landscapes: Power, Community and Fortification in Medieval England. London: Equinox. ISBN 978-1-904768-67-8.
The Siege and Destruction of Jerusalem by the Romans Under the Command of Titus, A.D. 70, by David Roberts (1850), shows the city burning. Early thermal weapons, which used heat or burning action to destroy or damage enemy personnel, fortifications or territories, were employed in warfare during the classical and medieval periods (approximately the 8th century BC until the mid-16th century AD).
Although castle has not become a generic term for a manor house (like château in French and Schloss in German), many manor houses contain castle in their name while having few if any of the architectural characteristics, usually as their owners liked to maintain a link to the past and felt the term castle was a masculine expression of their ...