420

320

+300

 

 

 

{ 2 3 4 ei 6 7 8 9 10
| | j ! ! { i | |

 

Figure 5. (Engineers Series) Composite Curve of Improvement Over a Period of
Ten Weeks. The average of production is the average of measured efforts pro-
duced in the fatigue curves of each day.

 

-- 600 t ; an

$80

S40

520

 

|_500 e

Ist day 2 3 4 S 6 7 8 9 10
i n l j n ! I l

 

 

 

Figure 6. Declining Composite Curve of Costs in Heartbeats Over the Period of
Ten Weeks Shown in Figure 5. The averages are taken from the curves of con-
dition which are plotted from five different pulse rates, taken immediately before
the production of the fatigue curve, immediately afterward, after two, four, and
six minutes rest.

28