Fatigue of five-hour sewing of unlined Kimono was measured with fourteen subjects who were classified in flicker fusion pattern type 3, type 4 and type 6 in the previous report.
After two-hour sewing a fifteen-minute break was given, and when another one-hour sewing has finished forty five-minute lunch time was taken. In the afternoon subjects sewed for two hours. The measurement was made by flicker gauge and near-point meter eight times as follows :
#1- -before starting sewing, #2- -after one-hour sewing, #3- -after two-hour sewing, #4 - - after fifteen-minute rest, #5- -at the end of morning work of three-hour sewing, #6- -before startingafterncon work, #7- -after one-hour sewing in the afternoon and #8- -at the end of the wholework.
The results were compared with those obtained in the previous paper in which an unintermittent sixty-minute rest was given at lunch time.
Comparing ratios of #5 value to #1 value obtained in “work with two divided rests” and “work with one unintermittent rest”, it has been found that in the latter which has no break between#5 and #1 measurements the ratio shows that both F and N values turn to worse side during the three-hour sewing, but in the former sometimes N turns to better while F tums to worse.
Comparison of ratios of #6 to #5 shows that more recovery is made by lunch break in “dividedrests”examination than “one rest”examination; especially larger recovery is shown with the Nvalue.
From the ratios of #8 to #1 it is seen that “divided rests”is better viewed from “ recovery”.
With fourteen subjects the following different types of effect of “divided rests”, based upon Fand Nvalues, are observed :
1. recovery is made by each rest,
2. recovery is made mentally but not physically,
3. no recovery is made.
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