Quarry Accidents in the United States During the Calendar Year 1938 Page: 5
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QUARRY ACCIDENTS IN THE UNITED STATES, 1938 5
CLASSIFICATION OF INJURIES
From 1915 to 1929 the Bureau's statistics of accidents at quarries
divided all injuries into five classes, as follows: (1) Fatalities, (2) per-
manent total disabilities, (3) permanent partial disabilities, (4) tempo-
rary disabilities lasting more than 14 days, and (5) temporary disa-
bilities lasting more than the remainder of the day on which the acci-
dent occurred but not exceeding 14 days. Beginning with 1930,
classes (4) and (5) were consolidated under the general class of tempo-
Figures covering accidents at quarries for the 5-year period 1934-38
are given in table 34, page 60.
DEFINITION OF ACCIDENT RATES
All accident rates shown in this publication, except where other-
wise stated, have been calculated on the basis of a million man-hours
of employment or exposure to risk.
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Adams, William W. & Wrenn, Virginia E. Quarry Accidents in the United States During the Calendar Year 1938, report, 1940; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc12592/m1/7/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.