INDUSTRIAL LABOUR 



413 



Pressure eft fie two hands 



Horizontal componentqflefl fiandf 



Horizontal ' to/nponertt of ' 



8 /O 20 30 40 5O 



Time /.? hundredth^ cfa seco/id. . 



The net expenditure of energy per hour being 132-71 Cal. and 

 the work done being 4422-6 kilogrammetres. The expenditure 

 per kgm. is 



i = -03 grand calories. 



A net yield of about 8%. 



In this experiment any point of the file travels : 



54 x -26 X 2 = 28-08 metres per minute, or : 



468 metres per second. 

 The expenditure per gramme of filings is : 

 132-71 



45-57 



--= 2-91 Cal. 



As far as physiological effects are concerned, it will be' noted 

 that the respirations increase from 18 to 28 per minute, while, as 

 will be seen from fig. 286, the period of the inspirations is longer 

 than the normal. The pulse also increases from 72 to 89 per 

 minute. 



FIG. 286. 



Respiratory curve during filing. 



