PROCEEDINGS OF SECTION G. 



467 



to 40 per cent. ; and that ' Wages have greatly increased, 



but the cost of doing a given amount of work has decreased, 



so that five men can now do the work which would have 



demanded the labour of eight men in 1850.' " 



The following summary table compiled by me, and based on 



statistical information compiled by Mulhall and other authorities, 



regarding the marvellous growth of steam-power since the year 



1840, in the United Kingdom alone, add additional weight to Dr. 



Wells' conclusions : — 



Growth of steam-power engaged in the work of produc- 

 tion, transport, &c., in the United Kingdom between 

 the years 1840 and 1911. 



Relative Index of Physical Energy Used by Producing 

 Bread-winners and Auxiliary Steam Power, respec- 

 tively, in each year. 



