 | Frederick Walter Simms - 1834 - 124 pages
...on the limb, and subtractive when the contrary is the case. EXAMPLE. . „ Reading on the arc 31 56 off the arc ...... 31 22 Difference 0 34 Index error...than that on the arc of excess, the index error, = 17 seconds, must be subtracted from all observations taken with the instrument, until it be found, by... | |
 | Frederick Walter Simms - 1836 - 160 pages
...case. EXAMPLE. , /; Reading on the arc 3156 off the arc ...... 31 22 Difference 0 34 Index error z: — 0 17 In this case the reading on the arc being greater...that on the arc of excess, the index error, =: 17 seconds, must be subtracted from all observations taken with the instrument, until it be found, by... | |
 | Frederick Walter Simms - 1844 - 190 pages
...limb, and subtractive when the contrary is the case. EXAMPLE. / // Reading on the arc .... — 31 56 " off the arc ..... 31 22 Difference 0 34 Index error...greater than that on the arc of excess, the index error, zz: 17 seconds, must be subtracted from all observations taken with the instrument, until it be found,... | |
 | Sir J. Butler Williams - 1846 - 368 pages
...Example. — Reading on the arc „ off the arc Difference Index error . . . 31' 56" . . 31 22 0 34 = - 0 17 In this case the reading on the arc being greater...until it be found, by a similar process, that the index error has altered." "To make the Line of Collimation of the Telescope parallel to the Plane of... | |
 | Benjamin Pike - 1848 - 356 pages
...Reading on the arc - - - 31 56 " off the arc - - "3l 22 Difference - - - - 0 34 Index error - - = — 017 In this case, the reading on the arc being greater...than that on the arc of excess, the index error, = 17 seconds, must be subtracted from all observations taken with the instrument, until it be found, by... | |
 | Benjamin Pike (Jr.) - 1848 - 482 pages
...Reading on the arc - - - 31 56 off the arc - - 3^ 22 Difference - - - - 0 34 Index error - - — — 017 In this case, the reading on the arc being greater...than that on the arc of excess, the index error, = 17 seconds, must be subtracted from all observations taken with the instrument, until it be found, by... | |
 | Sir Henry Edward Landor Thuillier - 1851 - 826 pages
...limb, and subtractive when the contrary is the case. EXAMPLE. - " Reading on the arc, 31 56 „ offthe arc, 31 22 Difference, 0 34 Index error, = — 0 17...than that on the arc of excess, the index error, = 17 seconds, must be subtracted from all observations taken with the instrument, until it be found, by... | |
 | Elias Loomis - 1855 - 510 pages
...that on the limb, and subtractive when the contrary is the case. EXAMPLE. Reading on the arc 31' 56" Reading off the arc 31 22 Difference 0' 34" Index...all observations taken with the instrument, until it is found, by a similar process, that the index error has changed. 4. To set the axis of the telescope... | |
 | Elias Loomis - 1855 - 508 pages
...the contrary is the case. EXAMPLE. Reading on the arc 31' 56" Reading off the arc 31 22 Difference V 34" Index e'rror = -0' 17" In this case, the reading...all observations taken with the instrument, until it is found, by a similar process, that the index error has changed. 4. To set the axis of the telescope... | |
 | Elias Loomis - 1860 - 518 pages
...contrary is the case. EXAMPLE. Reading on the arc 31' 56" Reading off the arc 31 22 Difference Index error In this case, the reading on the arc being greater...all observations taken with the instrument, until it is found, by a similar process, that the index error has changed. 4. To set the axis of the telescope... | |
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... reading off the arc; and half the difference of these numbers is the index error; additive when the reading on the arc of excess is greater than that on the limb, and subtractive when the contrary is the case. EXAMPLE. . 