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Show TH SUSD\‘H" g Ge‘&lf{\ ) OUF l}\ Ve the V S o )U\flfl«' L€ ey hem fr and th be throug Dents ould d " Wa § 1an d yea 1ds o vatio ments r tim emen | hav 18t W pove ork nan' an e urin k th eate O SCIENTIFI MANAGEMEN 3 more money in trying to find the exact law which we were after Some years later, when more money was available for this purpose gy PRINCIPLE a second series of experiments was made, similar to the first, bu This, however, resulted, as the first exsomewhat more thorough periments, in obtaining valuable information, but not in the development of a law. Again, some years later, a third series of experiment was made, and this time no trouble was spared in our endeavo KEvery minute element which coul to make the work thorough in any way affect the problem was carefully noted and studied and two college men devoted about three months to the experiAfter this data was again translated into foot-pounds o ments energy exerted for each man each day, it became perfectly clear that there is no direct relation between the horse-power which man exerts (that is, his foot-pounds of energy per day) and th tiring effect of the work on the man The writer, however, wa quite as firmly convinced as ever that some definite, clear-cut la existed as to what constitutes a full day's work for a first-class laborer and our data had been so carefully collected and recorded that h felt sure that the necessary information was included somewher in the records The problem of developing this law from the accumulated facts was therefore handed over to Mr. Carl G. Barth, who i a better mathematician than any of the rest of us, and we decide to investigate the problem in a new way, by graphically representin each element of the work through plotting curves, which shoul give us, as it were, a bird's-eye view of every element In a comparatively short time Mr. Barth had discovered the law governin the tiring effect of heavy labor on a first-class man And it is s simple in its nature that it is truly remarkable that it should no have been discovered and clearly understood years before Th law which was developed is as follows The law is confined to that class of work in which the limit of man's capacity is reached because he is tired out It is the law o heavy laboring, corresponding to the work of the cart horse, rathe than that of the trotter. Practically all such work consists of heavy pull or a push on the man's arms, that is, the man's strengt is exerted by either lifting or pushin somethin whic he grasp fay' in his hands And the law is that for each given pull or push o the man's arms it is possible for the workman to be under load fo only a definite percentage of the day For example, when pig ic iron is being handled (each pig weighing 92 pounds), a first-clas workman can only be under load 43 per cent. of the day He mus be entirely free from load during 57 per cent. of the day And a E‘fOI'e an |
