"later also against the French Second Army. The name Yperite comes from its usage by the German army near the town of Ypres. The Allies did not use mustard agent until November 1917 at Cambrai, France, after the armies had captured a stockpile of German mustard shells. It took the British more than a year to develop their own mustard agent weapon, with production of the chemicals centred on Avonmouth Docks. (The only option available to the British was the Despretz–Niemann–Guthrie process). This was used first in September 1918 during the breaking of the Hindenburg Line. Mustard agent was dispersed"
"identified as chlorine and the first Allied mass-produced anti-gas helmet was a flannel bag soaked in glycerine, hyposulphite and sodium bicarbonate. On 19 December 1915, the German 4th Army conducted an attack at Ypres using a new gas, a mixture of chlorine and phosgene, a much more lethal concoction. The British took a prisoner who disclosed the intended gas attack and gleaned information from other sources, which led to the divisions of VI Corps being alerted from 15 December. The gas discharge was accompanied by German raiding parties, most of which were engaged by small-arms fire, while attempting to cross"
"phosgene, tear gas, chlorarsines and mustard gas. At the beginning of the war, Germany had the most advanced chemical industry in the world, accounting for more than 80% of the world's dye and chemical production. Although the use of poison gas had been banned by the Hague Conventions of 1899 and 1907, Germany turned to this industry for what it hoped would be a decisive weapon to break the deadlock of trench warfare. Chlorine gas was first used on the battlefield in April 1915 at the Second Battle of Ypres in Belgium. The unknown gas appeared to be a simple"
"German Phosgene attack (19 December 1915) The German Phosgene attack (19 December 1915), was the first use of phosgene gas against British troops by the German army. The gas attack took place at Wieltje, north-east of Ypres in Belgian Flanders on the Western Front in the First World War. German gas attacks on Allied troops had begun on 22 April 1915, during the Second Battle of Ypres using chlorine against French and Canadian units. The surprise led to the capture of much of the Ypres Salient, after which the effectiveness of gas as a weapon diminished, because the French and"
"German observation. On 11 July 1917, during ""Unternehmen Strandfest"" (Operation Beachparty) at Nieuport on the coast, the Germans introduced a new weapon into the war when they fired a powerful blistering agent Sulfur mustard (Yellow Cross) gas. The artillery deployment allowed heavy concentrations of the gas to be used on selected targets. Mustard gas was persistent and could contaminate an area for days, denying it to the British, an additional demoralising factor. The Allies increased production of gas for chemical warfare but took until late 1918 to copy the Germans and begin using mustard gas. From 31 July to 10"
"concussion, which leaves no mark on the victim. After the war, German scientist Fritz Haber, who pioneered German gas attacks at the Second Battle of Ypres, said German soldiers had reported a strong chemical smell attributed to turpenite. Haber and others investigated, finding the smell was due to incomplete combustion of the picric acid used in British artillery shells. The belief that the French used chemical weapons in 1914 may have contributed to later German use of such weapons. Turpinite Turpinite, also called Turpenite, is a fictional war gas allegedly developed by the French chemist Eugène Turpin and deployed against"
"Germany, against British troops at Wieltje near Ypres, Belgium on 19 December 1915, 88 tons of the gas were released from cylinders causing 1069 casualties and 69 deaths. The British P gas helmet, issued at the time, was impregnated with sodium phenolate and partially effective against phosgene. The modified PH Gas Helmet, which was impregnated with phenate hexamine and hexamethylene tetramine (urotropine) to improve the protection against phosgene, was issued in January 1916. Around 36,600 tons of phosgene were manufactured during the war, out of a total of 190,000 tons for all chemical weapons, making it second only to chlorine"
"in the phosgene attack at Wieltje, north-east of Ypres. This and earlier gas attacks, beginning at the Second Battle of Ypres (21 April – 25 May 1915) had given the British time to replace improvised gas masks with effective mass-produced versions, obtain other anti-gas equipment and to establish anti-gas procedures. Helmets impregnated with chemicals to neutralise chlorine had been issued in several variants, each more effective than the last. By April 1916, British troops had PH helmets and some specialist troops like machine-gunners, were equipped with box respirators. The German gas attack at Wulverghem on 30 April, caused the defenders"
"town of Ypres. The Allies did not use mustard gas until November 1917 at Cambrai, France, after the armies had captured a stockpile of German mustard-gas shells. It took the British more than a year to develop their own mustard gas weapon, with production of the chemicals centred on Avonmouth Docks. (The only option available to the British was the Despretz–Niemann–Guthrie process). This was used first in September 1918 during the breaking of the Hindenburg Line with the Hundred Days' Offensive. After the sinking of by the German submarine U-20 in May 1915, Lieutenant-Commander Godfrey Herbert, commanding officer of the"
"medical authorities, arrived at a figure of casualties, of whom died. After the operation, the Germans concluded that a breakthrough could not be achieved solely by the use of gas. During the evening of 22 April 1915, German pioneers released chlorine gas from cylinders placed in trenches at the Ypres Salient. The gas drifted into the positions of the French 87th Territorial and the 45th Algerian divisions, which occupied the north side of the salient and caused many of the troops to run back from the cloud. A gap had been made in the Allied line, which if exploited by"
"German army in August 1914; however, the Germans were the first to seriously research chemical warfare. Poison gas (chlorine) was first used on April 22, 1915, at the Second Battle of Ypres, by the German army. April 1915 saw the first innovation in protection against chemical warfare: a cotton pad dipped in bicarbonate of soda, but by 1918, troops on both sides had charcoal respirators. By November 11, 1918, France had suffered 190,000 chemical warfare casualties, including 8,000 dead. At the outbreak of war the French Army retained the colourful traditional uniforms of the nineteenth century for active service wear."
"were also ineffective. The first use of more lethal chemical weapons was against the French near the Belgian town of Ypres. Despite the German plans to maintain the stalemate with the French and British, Albrecht, Duke of Württemberg, commander of the 4th Army planned an offensive at Ypres, site of the First Battle of Ypres in November 1914. The Second Battle of Ypres, April 1915, was intended to divert attention from offensives in the Eastern Front and disrupt Franco-British planning. After a two-day bombardment, the Germans released of of chlorine gas onto the battlefield. Though primarily a powerful irritant, it"
"Green Cross (chemical warfare) Green Cross (Grünkreuz) is a World War I chemical warfare pulmonary agent consisting of chloropicrin (PS, Aquinite, Klop), phosgene (CG, Collongite) and/or trichloromethyl chloroformate (Surpalite, Perstoff). Green Cross is also a generic World War I German marking for artillery shells with pulmonary agents (chemical payload affecting the lungs). The tip of the projectile with the fuse end painted green and a green cross at the bottom of the cartridge. Other Green Cross mixtures were based on phosgene and/or diphosgene. The first use of Green Cross was on May 31 1915 in a German offensive in Ypres."
"had become less devastating at the war's end. Several different gas agents were used. Tear gas was first employed in August 1914 by the French, but this could only temporarily disable the enemy. In April 1915, chlorine gas was first used by Germany at the Second Battle of Ypres. Exposure to a large dose could kill, and those not killed could suffer permanent lung damage. But the gas was easy to detect by scent and sight. Phosgene, first used in December 1915, was the most lethal killing gas of World War I; it was 18 times more powerful than chlorine"
"cold weather, and again the experiment went unnoticed by the Allies. The first effective use were when the German forces at the Second Battle of Ypres simply opened cylinders of chlorine and allowed the wind to carry the gas across enemy lines. While simple, this technique had numerous disadvantages. Moving large numbers of heavy gas cylinders to the front-line positions from where the gas would be released was a lengthy and difficult logistical task. Stockpiles of cylinders had to be stored at the front line, posing a great risk if hit by artillery shells. Gas delivery depended greatly on wind"
"the teams developing chlorine gas and other deadly gases for use in trench warfare, Haber was on hand personally when it was first released by the German military at the Second Battle of Ypres (22 April to 25 May 1915) in Belgium. Haber also helped to develop gas masks with adsorbent filters which could protect against such weapons. A special troop was formed for gas warfare (Pioneer Regiments 35 and 36), under the command of Otto Peterson, with Haber and Friedrich Kerschbaum as advisors. Haber actively recruited physicists, chemists, and other scientists to be transferred to the unit. Future Nobel"
"army high command) accepted a proposal from the 4th Army, for a gas attack east of Ypres and a specialist Gas Pioneer regiment was provided. The mixture of chlorine and phosgene was to be used against British troops for the first time. The XXVII Reserve Corps commander, General von Schubert objected to the plan, since if successful, an attack would move the front line into even more marshy ground, just before winter. Schubert preferred to make an attack near Wieltje, with Ypres as the ultimate objective but the resources for such an ambitious attack did not exist. By mid-November, the"
"wearer to breathe the safer air found there. In addition, moist sponges were inserted at the end of the hoses in order to better filter the air. This was later modified to include its own air supply, leading to World War I era gas masks.<ref name=""pbs.org/wgbh/theymadeamerica2""></ref><ref name=""encyclopedia.com/topic/Garrett_Morgan2""></ref><ref name=""biography.com/people/garrett-morgan2""></ref> The German army used poison gas for the first time against Allied troops at the Second Battle of Ypres, Belgium on 22 April 1915. As an immediate response was cotton wool wrapped in muslin issued to the troops by 1 May. This was followed by the Black Veil Respirator, invented by John"
"British lines. Two days later the Germans began another gas attack but the wind turned and blew the gas back over the German lines. A large number of German casualties were caused by the change in the wind direction and the decision to go ahead against protests by local officers, which were increased by British troops, who fired on German soldiers as they fled in the open. The gas used by the German troops at Hulluch was a mixture of chlorine and phosgene, which had first been used on 19 December 1915 at Wieltje, near Ypres. The German gas was"
"D.C. on Christmas Day, 1917, and arrived at the front in May 1918. During its time in France, the First Gas Regiment used phosgene in a number of attacks. The United States began large-scale production of an improved vesicant gas known as Lewisite, for use in an offensive planned for early 1919. Lewisite was a major American contribution to the chemical weapon arsenal of World War I, although it was not actually used in the field during World War I. It was developed by Captain Winford Lee Lewis of the U.S. Chemical Warfare Service in 1917. (The Germans later claimed"
"Yellow Cross (chemical warfare) Yellow Cross (Gelbkreuz) is a World War I chemical warfare agent usually based on sulfur mustard (HS, Yperite, Lost). The original Gelbkreuz was a composition of 80–90% of sulfur mustard and 10–20% of tetrachloromethane or chlorobenzene as a solvent which lowered its viscosity and acted as an antifreeze, or, alternatively, 80% sulfur mustard, 10% bis(chloromethyl) ether, and 10% tetrachloromethane. A later formulation, Gelbkreuz 1, was a mixture of 40% ethyldichloroarsine, 40% ethyldibromoarsine, and 20% of bis(chloromethyl) ether. In some cases nitrobenzene was used to mask the material's characteristic odor. French ""ypérite no.20"" was a similar mixture"
"and much more difficult to detect. However, the most effective gas was mustard gas, introduced by Germany in July 1917. Mustard gas was not as fatal as phosgene, but it was hard to detect and lingered on the surface of the battlefield, so could inflict casualties over a long period. Even if not inhaled, it could slowly burn the skin, but quickly burned via the eyes or any wounds, causing blindness and intense suffering. Mustard gas also had the property of being heavier than air, causing it to sink down hills and therefore down into trenches. Casualties from mustard gas"
"of the high ground; in addition, their trenches tended to be better built, since Anglo-French trenches were initially intended as ""temporary,"" preparatory to breaking the German defences. Both sides tried to break the stalemate using scientific and technological advances. On 22 April 1915, at the Second Battle of Ypres, the Germans (violating the Hague Convention) used chlorine gas for the first time on the Western Front. Several types of gas soon became widely used by both sides, and though it never proved a decisive, battle-winning weapon, poison gas became one of the most-feared and best-remembered horrors of the war. Tanks"
"August 1914 against invading German troops. Once the war had degenerated into trench warfare and new methods to attain an advantage were sought, the German Army initiated a chlorine gas attack against the French Army at Ypres on 15 April 1915, initiating a new method of warfare but failed that day to exploit the resulting break in the French line. In time, the more potent phosgene replaced chlorine in use by armies on the Western Front, including France, leading to massive casualties on both sides of the conflict however the effects were mitigated by development of protective clothing and masks"
"chlorine atoms hydrolyze from the rest of the molecule forming hypochlorous acid (HOCl), which acts as a general biocide, killing germs, micro-organisms, algae, and so on. Chlorine gas, also known as bertholite, was first used as a weapon in World War I by Germany on April 22, 1915 in the Second Battle of Ypres. As described by the soldiers, it had the distinctive smell of a mixture of pepper and pineapple. It also tasted metallic and stung the back of the throat and chest. Chlorine reacts with water in the mucosa of the lungs to form hydrochloric acid, destructive to"
"the Mark I model helmet of 1916 which had a separate folded rim, a two-part liner, and matte khaki paint finished with sand, sawdust, or crushed cork to give a dull, non-reflective appearance. The first use of poison gas on the Western Front was on 22 April 1915, by the Germans at Ypres, against Canadian and French colonial troops. The initial response was to equip troops with cotton mouth pads for protection. Soon afterwards the British introduced the Black Veil Respirator, which consisted of a long cloth which was used to tie chemical-soaked mouth pads into place. Dr. Cluny MacPherson"
"originally chlorine and later phosgene, diphosgene and mustard gas. They also used relatively small amounts of the irritant gases chloromethyl chloroformate, chloropicrin, bromacetone and ethyl iodoacetate. Gases were frequently mixed, for example ""white star"" was the name given to a mixture of equal volumes of chlorine and phosgene, the chlorine helping to spread the denser but more toxic phosgene. Despite the technical developments, chemical weapons suffered from diminishing effectiveness as the war progressed because of the protective equipment and training which the use engendered on both sides. Mustard gas was first used effectively in World War I by the German"
"Second Battle of Ypres During World War I, the Battle of Ypres 1915 (2nd Battle of Ypres) was fought from for control of the strategic Flemish town of Ypres in western Belgium. The First Battle of Ypres had been fought the previous autumn. It was the first mass use by Germany of poison gas on the Western Front. It also marked the first time a former colonial force (the 1st Canadian Division) defeated a European power (the German Empire) in Europe (at the battles of St. Julien and Kitcheners' Wood). The eminent German chemist Walther Nernst. who was with the"
"it gadolinite in honor of Gadolin. Friedrich Wöhler mistakenly thought he had isolated the metal in 1828 from a volatile chloride he supposed to be yttrium chloride, but Heinrich Rose proved otherwise in 1843 and correctly isolated the element himself that year. Until the early 1920s, the chemical symbol Yt was used for the element, after which Y came into common use. In 1987, yttrium barium copper oxide was found to achieve high-temperature superconductivity. It was only the second material known to exhibit this property, and it was the first known material to achieve superconductivity above the (economically important) boiling"
"which was a flannel bag with a celluloid window, which entirely covered the head. The race was then on between the introduction of new and more effective poison gases and the production of effective countermeasures, which marked gas warfare until the armistice in November 1918. The British expressed outrage at Germany's use of poison gas at Ypres and responded by developing their own gas warfare capability. The commander of II Corps, Lieutenant General Sir Charles Ferguson, said of gas: The first use of gas by the British was at the Battle of Loos, 25 September 1915, but the attempt was"
"Turpinite Turpinite, also called Turpenite, is a fictional war gas allegedly developed by the French chemist Eugène Turpin and deployed against the attacking German army during the first months of World War I. According to contemporary accounts, Turpinite, delivered by artillery shells, silently and suddenly killed any person within of impact with its fumes. Survivors of Turpinite barrages reported a strong chemical smell after an attack. In reality, this smell was a side effect of the explosives used by the French and British militaries during the war. The widespread, sudden deaths caused by artillery were in many cases caused by"
"Black Veil Respirator The Black Veil Respirator was an early British gas mask designed by John Scott Haldane and introduced in May 1915. The German army used chlorine as a poison gas for the first time against Allied troops at the Second Battle of Ypres on 22 April 1915. As an immediate response, the British began issuing cotton wool wrapped in muslin to its troops by 3 May. This was followed by the Black Veil Respirator, invented by John Scott Haldane. The Black Veil was a cotton pad soaked in an absorbent solution which was secured over the mouth using"
"anilines. Hypergolic propellants were discovered independently, for the third time, in the U.S. by GALCIT and Navy Annapolis researchers in 1940. They developed engines powered by aniline and nitric acid. Robert Goddard, Reaction Motors, and Curtiss-Wright worked on aniline/nitric acid engines in the early 1940s, for small missiles and jet assisted take-off (JATO). In Germany from the mid-1930s through World War II, rocket propellants were broadly classed as monergols, hypergols, non-hypergols and lithergols. The ending ""ergol"" is a combination of Greek ""ergon"" or work, and Latin ""oleum"" or oil, later influenced by the chemical suffix ""-ol"" from alcohol. Monergols were"