Introduction to Einstein

It is the purpose of this booklet therefore, to bring within the scope of visualization, as nearly as possible, the very essence of relativity, and to state its principles in terms devoid of unfamiliar phrases and illustrations. The popular mind is not satisfied with vague statements, mathematical equations and formulæ. It calls for an explanation in words of every day usage, and where a technical term must be employed then a definition of that term in language simple and lucid. To meet these re