 | William Galbraith - Astronomy - 1834 - 454 pages
...half the sum of these five logarithms will be the logarithm of the spherical excess in seconds. 2. To the logarithm of the area of the triangle taken as a plane one in feet, add the constant logarithm 0.674690 ; the sum is the logarithm of the excess above 180° in seconds.... | |
 | Thomas Keith - 1839 - 498 pages
...the surface of the earth f, ought to exceed 180°; which excess may be found by the following rule. From the logarithm of the area of the triangle taken...plane one, in feet, subtract the constant logarithm 9-3267737, and the remainder is the logarithm of the excess above 180° in seconds nearly.^ Put \ of... | |
 | John Gregory - 1842 - 328 pages
...every triangle on the surface of the earth, ought to exceed 180°. To find this excess, which is called the spherical excess: — From the logarithm of the...plane one, in feet, subtract the constant logarithm 9-3267737, and the remainderis thelogarithm of the excess above 180° in seconds, nearly. Stations.... | |
 | Edward Spon - Engineering - 1872 - 404 pages
...if the triangle were a plane one, without any sensible error. Hence we have the following Sale.— From the logarithm of the area of the triangle, taken...plane one in feet, subtract the constant logarithm 9 '32540, the remainder will be the logarithm of the spherical excess in seconds, nearly. When the... | |
 | Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - Engineering - 1874 - 396 pages
...if the triangle were a plane one, without any sensible error. Hence we have the following Sale.— From the logarithm of the area of the triangle, taken...plane one in feet, subtract the constant logarithm 9-32540, the remainder will be the logarithm of the spherical excess in seconds, nearly. When the triangles... | |
 | William John M'Clelland - 1886 - 210 pages
...by him in the Trigonometrical Survey of the British Isles. He gave it in the following form : — " From the logarithm of the area of the triangle, taken...plane one, in feet, subtract the constant logarithm 9'3267737; and the remainder is the logarithm of the excess above 180°, in seconds, nearly." 110.... | |
 | Edward Albert Bowser - Trigonometry - 1892 - 392 pages
...was used by him in the Trigonometric Survey of the British Isles. He gave it in the following form : From the logarithm of the area of the triangle, taken as a plane triangle, in square feet, subtract the 'constant logarithm 9.3267737 ; and the remainder is the logarithm... | |
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From the logarithm of the area of the triangle, taken as a plane one, in feet, subtract the constant log 9-3267737, then the remainder is the logarithm of the excess above 180°, in seconds nearly.* 3. 
