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CLASSIFICATION OF NON-FATAL ACCIDENTS

Cause. Hand labor Special industries machine Follo Mise - Unclassified Eye injuries Vehicles Nails Burns Infections from cutsete Falling material Saws Presses Street Railways Claus Railroad equipment bears Elevators Belling Animals, insects, etc Lathes Emery wheels Hoists Electricity Shafline, sei screws, etc Wood moulders, eic Drills Cranes 15 Other Causes.

BY CAUSES.
July 1,1912 to June 30,1913.

15.000

2.5cm

5000

30.ndo

Massachusetts Industrial Accident Board.

Diagram 2.

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Gears,
Emery wheels,
Occupational diseases,
Glass,
Wood molders, .
Assault and fighting,

2 2 2 1 1 1

Total,

474

laneous causes.

As shown above, the heaviest causes of fatal accidents were due to railroad equipment, falls, vehicles, hand labor, elevators, electricity and street railways. By grouping these figures into the three classifications made for non-fatal accidents, — hand labor, machinery and miscellaneous causes, - the following results are found: Eighty-two per cent. of the fatalities were due to miscel

Of these causes about 30 per cent. were contributed by railroad equipment and 17 per cent. by falls. Ten per cent of the fatalities were caused by machinery. Eight per cent. were caused by hand labor. (Table IV.)

Comparing the frequency distribution of non-fatal and fatal accidents by causes, there is found to be no concomitance in magnitude between the two groups. The two classes of accidents are on distinct bases. The figures on non-fatal accidents indicate for the general field where the heaviest cause incidence lies; those on fatal accidents give additional weight to those causes which resulted in cases of an extremely serious nature, and shift the burden of incidence accordingly.

The next relationship to be developed in connection with non-fatal and fatal accidents is that between the time and frequency of occurrence. To bring out more clearly the hours of the day on which non-fatal accidents fell, a curve has been drawn (Diagram 3) showing the distribution of accidents for each hour of the day for the year.

As indicated, the bulk of the accidents occur between 6 A.M. and 6 P.M., the period in which the average working day occurs. The sharp rise in the number of accidents between 6 A.M. and 10 and 11 A.M. is indicative of conditions resting on physical and physiological laws.

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