. Carnegie Institution of Washington publication. ALBITK. 49 It will be remembered that in the preliminary experiments (p. 28 et scq.) the heating curve of these natural feldspars did not show an absorption of heat which we were able to detect; our first step was, therefore, to find out what manner of process it was by which a charge of crystalline albitc or orthoclase became amorphous without leaving a thermal record behind. We prepared a charge of albite glass from a previous melt powdered to " ; In this glass powder a small crystal fragment (per- haps 2 x 5 x 10 mm.) from
. Carnegie Institution of Washington publication. ALBITK. 49 It will be remembered that in the preliminary experiments (p. 28 et scq.) the heating curve of these natural feldspars did not show an absorption of heat which we were able to detect; our first step was, therefore, to find out what manner of process it was by which a charge of crystalline albitc or orthoclase became amorphous without leaving a thermal record behind. We prepared a charge of albite glass from a previous melt powdered to " ; In this glass powder a small crystal fragment (per- haps 2 x 5 x 10 mm.) from the same original specimen and, therefore, of the same chemical composition, was embedded beside the thermo-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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