. Carnegie Institution of Washington publication. FIG. 7.—Longitudinal section of an agar plate dried at 70° C. without superficial shrinkage, with development of elongated spaces or cavities which are found when the film is hydrated Drawn with camera lucida by Miss C. L. Carey. FIG. 8.—Scale designed for measuring thickness of paper and suitable for determining!thickness of sections of plates of biocolloids. Sheets of a thickness of to inch(= mm.) may be measured (see fig. 23 for calipers used in measuring larger objects). Isaac Harris, offSquibb & Sons' labora
. Carnegie Institution of Washington publication. FIG. 7.—Longitudinal section of an agar plate dried at 70° C. without superficial shrinkage, with development of elongated spaces or cavities which are found when the film is hydrated Drawn with camera lucida by Miss C. L. Carey. FIG. 8.—Scale designed for measuring thickness of paper and suitable for determining!thickness of sections of plates of biocolloids. Sheets of a thickness of to inch(= mm.) may be measured (see fig. 23 for calipers used in measuring larger objects). Isaac Harris, offSquibb & Sons' laboratories, New Brunswick, New Jersey, while Mr. E. R. Long furnished preparations of such sub- stances as zein, which made it possible to make up plates of biocolloids entirely from products of plants. The swelling of mixtures of agar and of the protein extract of bean in plates to mm. in thickness were as shown in table 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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