260 THE HUMAN MOTOR 



patient efforts of a quarter of a century, he made a veritable 

 revolution. Frank Gilbreth f 1 ) applied these same principles to 

 bricklayers' work with great success. Human labour is a very 

 complex thing, in which numerous factors, internal and external, 

 to the workman, have influence. Their study must not be merely 

 left to chance observation. It demands the methodical co- 

 operation of the laboratory and the workshop. 



Frank B. Gilbreth, Motion Study, London, 1911. 



