Publisher's Synopsis
Excerpt from Concerning the Annealing and Characteristics of Glass
Various arbitrary methods have been suggested for the purpose of determining a suitable annealing temperature. The majority of these involve tests which determine at what temperature the rate of deformation of loaded rods reaches a certain standard value. In such determinations the dimensions of the rods and the manner of loading must be taken into account. -t here are also a number of optical methods all of which are quite similar. These involve observations on the rate at which the double re fraction decreases at various temperatures, or determinations of the temperature at which it disappears in a reasonable time.
In the present investigation, the working range of temperature at which several kinds of glass should be annealed has been deter mined by a number of these methods. A discussion of some of the methods used and the results obtained follows.
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