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The P (or Phenate) Helmet, officially called the Tube Helmet , [1] appeared in July 1915, [2] replacing the simpler Hypo Helmet. It featured two mica eyepieces instead of the single visor of its predecessor, and added an exhale valve fed from a metal tube which the wearer held in his mouth. The exhale valve was needed because a double layer of ...
List of. How It's Made. episodes. How It's Made is a documentary television series that premiered on January 6, 2001, on the Discovery Channel in Canada and Science in the United States. The program is produced in the Canadian province of Quebec by Productions MAJ, Inc. and Productions MAJ 2. In the United Kingdom, it is broadcast on Discovery ...
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 it over his head and tucked the bottom into his tunic.
The Small Box Respirator (SBC) was a British gas mask of the First World War and a successor to the Large Box Respirator. In late 1916, the respirator was introduced by the British with the aim to provide reliable protection against chlorine and phosgene gases. [1] [page needed] The respirator offered a first line of defence against these.
Pith helmet. The pith helmet, also known as the safari helmet, salacot, [a] sola topee, sun helmet, topee, and topi [b] is a lightweight cloth-covered helmet made of sholapith. [1] The pith helmet originates from the Spanish military adaptation of the native salakot headgear of the Philippines. [2] [3]
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History. 235 E. 45th St., New York City, New York, U.S. History (stylized in all caps ), formerly and commonly known as the History Channel, is an American pay television network and flagship channel owned by A&E Networks, a joint venture between Hearst Communications and The Walt Disney Company 's General Entertainment Content Division.
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