DIY History | Transcribe | Scholarship at Iowa | Eccentricity of the Sextant by Frederic Furbish, 1893 | Eccentricity of the Sextant by Frederic Furbish, 1893, Page 93

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Eccentricity of the Sextant by Frederic Furbish, 1893

Eccentricity of the Sextant by Frederic Furbish, 1893, Page 93

[page]86[/page]

we reach 26[superscript][?s?][/superscript] and pick out 139.63 for (m) with the logarithm 2.14498. There are recorded in their proper places on the second line of the column headed M. Had the number been 26[superscript][?s?][/superscript].91 we would have looked in the table for 27[superscript][?s?][/superscript] or had it been 26[superscript][?s?][/superscript].50 we would have added half the difference between the numbers corresponding to 26[superscript][?s?][/superscript] and 27[superscript][?s?][/superscript] to that standing for 26[superscript][?s?][/superscript] and proceeded likewise with the logarithms.
     Turning now to the table headed VIII B (n) on page 642 we proceed in a similar manner. Entering the table with the hour angle 8[superscript]m[/superscript] 26[superscript][?s?][/superscript].09 which is practically (8 1/2)[superscript]m[/superscript] we find the number (n) to be 0.05" with a logarithm 8.6852. In general it is only necessary to interpolate to the nearest (1/4)[superscript]m[/superscript] in this table up to 15[superscript]m[/superscript] after that the nearest 10[superscript][?s?][/superscript].

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[page]86[/page] we reach 26[superscript][?s?][/superscript] and pick out 139.63 for (m) with the logarithm 2.14498. There are recorded in their proper places on the second line of the column headed M. Had the number been 26[superscript][?s?][/superscript].91 we would have looked in the table for 27[superscript][?s?][/superscript] or had it been 26[superscript][?s?][/superscript].50 we would have added half the difference between the numbers corresponding to 26[superscript][?s?][/superscript] and 27[superscript][?s?][/superscript] to that standing for 26[superscript][?s?][/superscript] and proceeded likewise with the logarithms. Turning now to the table headed VIII B (n) on page 642 we proceed in a similar manner. Entering the table with the hour angle 8[superscript]m[/superscript] 26[superscript][?s?][/superscript].09 which is practically (8 1/2)[superscript]m[/superscript] we find the number (n) to be 0.05" with a logarithm 8.6852. In general it is only necessary to interpolate to the nearest (1/4)[superscript]m[/superscript] in this table up to 15[superscript]m[/superscript] after that the nearest 10[superscript][?s?][/superscript].