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Heinrich's classic work was refuted by a 1980 book Industrial Accident Prevention, by Nestor Roos, H Heinrich, Julienne Brown and Dan Petersen. [6]Heinrich Revisited: Truisms or Myths by Fred A. Manuele, CSP, PE [2002, ISBN 0-87912-245-5 published by National Safety Council offers the following in the last chapter.
The accident triangle, also known as Heinrich's triangle or Bird's triangle, is a theory of industrial accident prevention. It shows a relationship between serious accidents, minor accidents and near misses. This idea proposes that if the number of minor accidents is reduced then there will be a corresponding fall in the number of serious ...
1920 disasters in North America (2 C) 1920 disasters in Oceania (1 P) E. Explosions in 1920 (1 P) F. 1920 fires (1 C, 6 P) H. 1920 health disasters (1 C) N.
1920 natural disasters in the United States (4 P) 1921 natural disasters in the United States (3 P) 1922 natural disasters in the United States (2 P)
1920s disasters in North America (14 C) 1920s disasters in Oceania (10 C) 1920s disasters in South America (5 C) 0–9. 1920 disasters (10 C) 1921 disasters (11 C)
1920s fires in North America (1 C, 5 P) 0–9. 1920 disasters in North America (2 C) 1921 disasters in North America (1 C) 1922 disasters in North America (2 C)
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On April 19, 1920, the Industrial Workers of the World (IWW) and the Metal Mine Workers Industrial Union called for a strike in the mines around Butte. They hoped the strike would help secure higher wages, an eight-hour day, and end the use of the rustling card, a system that allowed employers to blacklist employees involved in union organizing, among other goals. [1]