307 
ral 
10 
ld 
“greene Kate ~~ 
J, 000,000 Por~ 
“5 
r 
-Severity Rate per 
10.000 Tons 
1922 
22.2 26.4 
Accidents per 10,000,000 Pounds 
2.82 1.52 
Days Lost per 10,000 Pounds 
CHART 43 AcomeNT FREQUENCY AND SEVERITY RATES IN TERMS OF PRODUCTION 
From 1920 To 1925 oF 14 COMPANIES MANUFACTURING EXPLOSIVES. NUMBER OF 
EMPLOYEES, 2,035 
1920 
62.5 
-4 
1924 
14.8 
Accident frequency rate decrease ....................77.I per cent 
Accident severity rate decrease . veer 73.0 # 
sol 
i 
“atahty Rate per 
10.000 Tons ~ 
§ pi 
— ela ————taiteereeand 
1910 18 1919 1920 1921 1922 1923 1924 
63.6 58.5 55.8 72.0 54.9 60.5 54.9 54.5 56.5 
Fatalities per 10,000.000 Tons 
CHART 44 Accent FaTaLity Rates. iN TERMS oF Propuction From 1916 TO 102% 
OF 337 ANTHRACITE CoAL MINING CoMmPANIES. NUMBER OF EMPLOYEES, 160,000 
Fatality rate decrease ...... 
...I1.4 per cent 
<5