XLIX. The slow stretch in indiarubber, glass, and metal wires when subjected to a constant pull

Slow Stretch in Indlarubber, Glass, and Metal Wires. 513 data ; and that, therefore, what it deals with is the succession of simpler events which would take place within a model, which the procedure he must of necessity adopt obliges him to substitute for the more complex machinery of nature--viz.: that model which is defined by the data which he has to make the foundation of his reasoning.