Apparently not the entire truth: >There have been some claims and counter-claims regarding what the human hair was used for. While its use in meteorological in

Apparently not the entire truth: >There have been some claims and counter-claims regarding what the human hair was used for. While its use in meteorological instruments such as radiosonde hygrometers is acknowledged, there are disputed claims regarding human hair use in bombsight crosshairs, particularly the Norden bombsight. While anecdotal accounts of human hair in bombsights exist, verifiable accounts only indicate it was used in precision weather instruments. Surviving Norden bombsights reveal that the cross hairs were etched in glass by diamond cutters. http://www.defensemedianetwork.com/stories/hair-today-gone-tomorrow-all-for-the-war-effort/ http://www.defensemedianetwork.com/stories/hair-today-gone-t...