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Page x - ... column. The fourth shows the number of seconds to be added for every inch that the height of the barometer exceeds 30, or to be subtracted for each inch that it wants of 30 : and the last contains the number of seconds to be subtracted for each degree that the thermometer stands above 50°, or to be added for each degree that its height wants of 50°. If great accuracy be required, we must also deduct from the observed height of the barometer .003 i. for each degree that the thermometer near...

Page x - ... the cosine. The apparent altitude being found in the first column, the second shows the refraction when the barometer stands at 30 inches, which is its mean height on the level of the sea, and the thermometer at 50° of Fahrenheit. The third column contains the difference to be subtracted or added for every minute of altitude, reckoned from the nearest number in the first column. The fourth shows the number of seconds to be added for every inch that the height of the barometer exceeds 30, or...

Page x - ... 50°, or to be added for each degree that its height wants of 50°. If great accuracy be required, we must also deduct from the observed height of the barometer .003 i. for each degree that the thermometer near it is above 50°, and add an equal quantity for an equal depression. In fact, however, the table, as it now stands, is found to require the temperature to be estimated from the height of the thermometer within; and if we employed the height of the thermometer without, which would be more...

Page x - ... and the last contains the number of seconds to be subtracted for each degree that the thermometer stands above 50°, or to be added for each degree that its height wants of 50°. If great accuracy be required, we must also deduct from the observed height of the barometer .003 i. for each degree that the thermometer near it is above 50°, and add an equal quantity for an equal depression. In fact, however, the table, as it now stands, is found to require the temperature to be estimated from the...

Page x - ... Fahrenheit. The third column contains the difference to be subtracted or added for every minute of altitude, reckoned from the nearest number in the first column. The fourth shows the number of seconds to be added for every inch that the height of the barometer exceeds 30, or to be subtracted for each inch that it wants of 30 : and the last contains the number of seconds to be subtracted for each degree that the thermometer stands above 50°, or to be added for each degree that its height wants...

Page xix - ¿au»», die ich der gütigen Mittheilung des Herrn Hofraths Gauss verdanke. Sie setzt Logarithmentafeln mit 5 Decimalen voraus, aus denen man den Logarithmen der Tangente der Zenithdislanz nimmt.