THE JAMES FORREST LECTURE 1900. THE RELATIONS BETWEEN ELECTRICITY AND ENGINEERING.
William Henry Preece · Minutes of the Proceedings of the Institution of Civil Engineers · 1900
The nineteenth century is distinguished in our profession chiefly by the knowledge we have obtained of the constitution of matter and of the qualities of the materials we utilize for the service of man, of the presence and characteristics of that medium-the ether-which fills all space, and of the existence, indestructibility and protean character of that great natural source of force motion work and power which we call-energy.Electricity is only one of many forms of this energy.It is measurable in well-defined and accurately-determined units.It is produced and sold, utilized and wasted.It is therefore something distinctly objective.It has even been defined by Act of 1. m e Deflection of a Needle.-Asmall magnet like that freely [