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[Information sheets (20)] High pressure coal gasification (Lurgi system) for West Midland Gas Board at Coleshill, England / Woodall-Duckham Ltd. c1964.

High pressure coal gasification (Lurgi system) for West Midland Gas Board at Coleshill, England

circa 1964
Three information cards, bearing cuttings of photographs and captions describing Mr. Wilson Parry's experiments in trephination with obsidian knives, one from "The Lancet", two from "The Medical Press", English 1914

Three information cards

1914
Card with paper cuttings from "The Medical Press" giving information on flint-pointed bow-drill shafts used in trephining, English, 1914-1915

Card with paper cuttings from "The Medical Press"

1914-1915