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This primitive type of mask went through several stages of development before being superseded in 1916 by the canister gas mask. [12] More elaborate sorbent compounds were added later to further iterations of the helmet (P Helmet and PH helmet), to defeat other respiratory poison gases used such as phosgene, diphosgene and chloropicrin.
However, it was of fragile construction, required training to use effectively, and largely immobilized its wearers because they were concerned about the mask coming loose. [5] The Black Veil Respirator was soon replaced by the British Smoke Hood, an over the head canvas hood treated with chlorine-absorbing chemicals, invented by Cluny MacPherson.
See Family tree of English monarchs, Family tree of Scottish monarchs, and Family tree of Welsh monarchs. This also includes England, Scotland and Wales; all part of the United Kingdom as well as the French Norman invasion. For a simplified view, see: Family tree of British monarchs.
Created Date: 8/30/2012 4:52:52 PM
Before World War II, the events of 1914–1918 were generally known as the Great War or simply the World War. [1] In August 1914, the magazine The Independent wrote "This is the Great War. It names itself". [2] In October 1914, the Canadian magazine Maclean's similarly wrote, "Some wars name themselves. This is the Great War."
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Pictures of the pig whose heart was used for Lawrence Faucette's transplant at the family's home in Frederick, Md. At her husband’s request, Ann bought a new chair for their house in Frederick ...
Babcock was born on July 23, 1900, [4] into a family of thirteen children on a farm in Frontenac County, Ontario. [5] According to Babcock, the barn where he was born (which no longer exists) was located off Highway 38 in South Frontenac Township. [6] His father died in 1906 after a tree-cutting accident, when Babcock was only six years old.