What is the use of the modular ratio?

The title of this paper does not properly describe its scope. It savours perhaps of the frivolous and the ostentatious, but it was chosen because it indicated shortly its purpose of throwing doubt upon the current and generally accepted theory of reinforced concrete calculations in which the so-called "modular ratio" is so fundamental a factor Of course, the ratio of the moduli of elasticity of different materials enters into calculations as to the relations of such materials when subjected to static or dynamic forces. H. Kempton Dyson