1903 1904 : 1905 1906 
1907 
1908 
1909 
1910 
1911 
1912 
ia 
Mean Monruiy Carcn or Copiinc in Cwrs. per 100 Hours’ TRaw.ine In Arka X. 1903-1911 (SMooTtHEeD Curve) 
Sa enee 
TI fd a 
Sen 
EEE 
scaaetit mil 
ad MEAN Montuty Catcu oF CopLinc In Cwrs. per 100 Hours’ TRAwitING In Arma XIII. 1903-1911 (SMooraeD Curve) 
We 2166 500 1/13 
Fie. 5 
Fie. 6 
