. ~ 
3 
iC 
{0 
J" 
Rate 
¥ 
2( 
Severity Rate pew 10 Tone 
3 
1920 1921 1922 1923 1924 1925 
78.0 86.0 82.2 74.4 61.6 59.5 
Accidents per 10,000 Tons 
2.05 1.90 1.64 2.00 1.47 1.09 
Days Lost per 10 Tons 
CrART 54 AcciENT FREQUENCY AND SEVERITY RATES In TERMS OF PRODUCTION 
FroM 1920 T0 1926 oF 9 CoMPANIES MANUFACTURING CASTINGS. NUMBER OF 
EMPLOYEES, 5,253 
Accident frequency rate decrease ....................28.9 per cent 
Accident severity rate decrease .. vee..40.1 “ 
25