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During 1917, an additional mask strap was produced, intended to be worn around the head of the wearer. [4] The first model of the M2 mask was introduced during March 1916 and had a rectangular piece of cellophane glass for viewing, protected by a piece of glass in front of it. In April, the rectangle was replaced by two round pieces of ...
[10] 2.5 million masks were manufactured before being superseded. The helmet was a 50.5 cm × 48 cm (19.9 in × 18.9 in) canvas hood treated with chlorine-absorbing chemicals, fitted with a single rectangular mica eyepiece. [11] [a] It was a khaki-coloured flannel bag soaked in a solution of glycerin and sodium thiosulphate. The soldier placed ...
By late July 1915, 30 gas artillery batteries had been deployed to the German front lines, each equipped with several thousand gas shells. The use of gas was intended to dispose of the Russian garrison, which lacked adequate gas protection or masks. [2] The final assault plan called for multiple infantry units to advance after the gas had ...
The post commander arranged for the family to be given the trusteeship of Rags. [4] After several other tours of duty, the Hardenbergh family arrived at Governors Island in New York Harbor in 1924. The 16th Infantry Regiment of the 1st Division was stationed there and a number had served in World War I and were familiar with Rags and his exploits.
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Gas mask, WWI. The P helmet, PH helmet and PHG helmet were early types of gas mask issued by the British Army in the First World War, to protect troops against chlorine, phosgene and tear gases. Rather than having a separate filter for removing the toxic chemicals, they consisted of a gas-permeable hood worn over the head which was treated with ...
The Zelinsky-Kummant gas mask was the world's first gas mask [1] which had the ability to absorb a wide range of chemical warfare agents. The gas mask was developed in 1915 by Russian chemist Nikolay Zelinsky and technologist of the Triangle plant M.I. Kummant. [2] The design was later improved by I. D. Avalov and entered mass production.
In an era when most workers earned under $1000 a year, the basic exemption was $2,000 for a family. Above that level taxes began at the 2 percent rate in 1917, jumping to 12 percent in 1918. On top of that there were surcharges of one percent for incomes above $5,000 to 65 percent for incomes above $1,000,000.