Post by oskar2ndchev on Oct 3, 2008 10:31:17 GMT -8
I found this on "The Trench Line" in regard to the colors on the filter cannisters for US-issue SBR gas mask. Makes for some interesting reading.
Chemical Warfare in World War 1: The American Experience 1917-1918, by Major Charles Heller which is available online at:
www-cgsc.army.mil/carl/resources/csi/Heller/HELLER.asp
From the paper --
The footnote -- 5. Amos A. Fries, -Gas in Defense-, in -Gas in Attack- and -Gas in Defense- (Fort Leavenworth,KS: The General Service Schools Press, n.d.), 17-18, reprinted from the National Service Magazine, June-July 1919; "Report ... Defense Division," 12.
Chemical Warfare in World War 1: The American Experience 1917-1918, by Major Charles Heller which is available online at:
www-cgsc.army.mil/carl/resources/csi/Heller/HELLER.asp
From the paper --
When finally issued, each mask came with a small log book tied to the canvas case. Soldiers received instructions to record the length of time they wore the mask, both for drill and in combat. They were also required to identify each type of gas encountered. The purpose of this log was to ensure that the filter in the canister was replaced at the proper intervaL Filters for an SBR had a life of fifty to 100 hours of exposure, depending on the chemical agents. As might be expected, the log system did not work. As one gas officer remarked, "any man who in the hell of battle can keep such a record completely should be at once awarded a Distinguished Service Medal." Gas officers in some divisions came up with an alternative: they painted the number of the month of issue on the case. If and when filters became available, the officers replaced them based on their own estimate of exposure time. There were three types of AEF filter canisters. Those painted black were for training only and offered no protection against smoke or gas. Canisters colored yellow protected against smoke, offered greater gas protection, and had a high resistance to breathing. The green canister offered protection against smoke, had "sufficient" gas protection, and had a low resistance to breathing.5
The footnote -- 5. Amos A. Fries, -Gas in Defense-, in -Gas in Attack- and -Gas in Defense- (Fort Leavenworth,KS: The General Service Schools Press, n.d.), 17-18, reprinted from the National Service Magazine, June-July 1919; "Report ... Defense Division," 12.