30° 
200 
100 
Bf 
RF 
~equency Rote pe 
1.000.000 Tons 
4 
9 
>: 
Sewerity Rate per 
1,000 Tons, 
TC v— —— it patina semmmststmmmmerata] 
1016 1917 1918 1919 1920 1921 1922 1923 1924 
178.0 220.0 219.0 108.0 78.2 77.4 55.7 46.6 35.6 
Accidents per 1,000,000 Tons 
10.9 16.7 154 14.0 9.80 5.19 6.90 7.35 4.70 
Days Lost per 1,000 Tons 
CHART 47 AccENT FREQUENCY AND SEVERITY RATES IN TERMS OF PRODUCTION 
From 1016 TO 1925 OF 55 CoMPANIES MANUFACTURING COKE BY THE By-Propuct 
Process. NUMBER oF EMPLOYEES, 14,001 
Frequency rate decrease ....... 
Severity rate decrease .. 
PY o 38 § Der cent 
heel. 68.4 
or 
30 F—— 
oH 
Te 
Severity Rate per 
00.000 K.W.H. 
1923 
22.4 28.2 
Accidents per 100,000.000 K wh 
2.20 3.76 
Days Lost per 100,000 Kwh 
CuART 48 Accipent FREQUENCY AND SEVERITY RATES IN TERMS OF PRODUCTION 
FroM 1921 To 1926 OF 25 COMPANIES SUPPLYING ELECTRIC LIGHT AND POWER, 
NuMBER oF EMPLOYEES, 24,002 
Accident frequency rate decrease.....................5.35 per cent 
Accident severity rate decrease......................25.4 “ 
NY