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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 ...
The most frequently used chemicals during World War I were tear-inducing irritants rather than fatal or disabling poison. During World War I, the French Army was the first to employ tear gas, using 26 mm grenades filled with ethyl bromoacetate in August 1914.
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.
The Livens Projector was a simple mortar-like weapon that could throw large drums filled with flammable or toxic chemicals. [6]In the First World War, the Livens Projector became the standard means of delivering gas attacks by the British Army and it remained in its arsenal until the early years of the Second World War.
Captain Katherine "Kate" Houghton Beckett (portrayed by Stana Katic) is a homicide detective with the NYPD. Having graduated from New York City's prestigious Stuyvesant High School and Stanford University, she is a first-class investigator who has gained a reputation as a detective who is intrigued by unusual cases, although she is also known for her ability to empathize with the victims of ...
Zyklon labels from Dachau concentration camp used as evidence at the Nuremberg trials; the first and third panels contain manufacturer information and the brand name, the center panel reads "Poison Gas! Cyanide preparation to be opened and used only by trained personnel"
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).
The rural motte-and-bailey castles followed the traditional design, but the urban castles often lacked the traditional baileys, using parts of the town to fulfil this role instead. [73] Motte-and-bailey castles in Flanders were particularly numerous in the south along the Lower Rhine, a fiercely contested border. [74]