The Structural Engineer > Archive > Volume 24 (1946) > Issues > Issue 10 > Cements with Controlled Expansions and their Applications to Pre-Stressed Concrete
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Cements with Controlled Expansions and their Applications to Pre-Stressed Concrete

From the earliest times wise men have said there is nothing new under the sun. This statement may seem an exaggeration when applied to human conceptions, yet a study of some of the innovations shows that in many cases the main idea which guided the inventor had already been considered by one or other of his predecessors whose researches had failed to reach completion through lack of materials or other circumstances. We contemplate the history of inventions in a spirit of humility, mingled with pity for the lost efforts of so many would-be inventors. Henrie Lossier