Difference between revisions of "Page:ASC 1856 04 12 572-1.pdf/3"
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| − | the weight is compared with the National Standard Weight in air at the temperature 65°. | + | the weight is compared with the National Standard Weight in air at the temperature 65°.66 F (18°.7 C), and under the barometric pressure 29.75 <hi rend="superscript">in</hi> (755.64 <hi rend="superscript">mm</hi>). In order to compare the weight <hi rend="underline">in vacue</hi>, it is necessary to hear in mind that the specific gravity of the National Standard Weight at 32°F (0°C), as compared with water at its greatest density, is 21.157, and that of the copy is 8.151.<lb/> |
I am, dear Sir,<lb/> | I am, dear Sir,<lb/> | ||
Yours very faithfully<lb/> | Yours very faithfully<lb/> | ||
GB Airy | GB Airy | ||
Revision as of 16:28, 3 March 2021
This page has been proofread
the weight is compared with the National Standard Weight in air at the temperature 65°.66 F (18°.7 C), and under the barometric pressure 29.75 in (755.64 mm). In order to compare the weight in vacue, it is necessary to hear in mind that the specific gravity of the National Standard Weight at 32°F (0°C), as compared with water at its greatest density, is 21.157, and that of the copy is 8.151.
I am, dear Sir,
Yours very faithfully
GB Airy
