 | Royal Society (Great Britain) - Antarctica - 1839 - 94 pages
...cistern have been experimentally ascertained, and are marked upon the instrument: thus, capacity ^Vth, indicates that for every inch of elevation of the...mercury at the time of observation should be below (lie neutral point, the difference of the two is to be divided as before, and the quotient to be subtracted... | |
 | Julian R. Jackson - Scientific expeditions - 1841 - 650 pages
...cistern will be depressed 1-50 of an inch: for this, correction is made in the following manner : — When the mercury in the tube is above the neutral...between it and the neutral point is to be divided by the capacities, and the quotient added to the observed height, the result being the true height ; or if... | |
 | William Radcliff Birt - Storms - 1850 - 72 pages
...variation of the mercury in the tube, that in the cistern will vary contrariwise •jVth of an inch. When the mercury in the tube is above the neutral...difference between it and the neutral point is to be reduced in the proportion expressed by the " capacity " (in the case supposed, divided by 50), and... | |
 | Sir Henry Edward Landor Thuillier - Surveying - 1851 - 826 pages
...instrument, and marked thereon ; as is also its neutral point. In this case, when the mercury in the ytube is above the neutral point, the difference between...is to be divided by the capacity, and the quotient added to the observed height will give the correct height ; if the mercury be below the neutral point,... | |
 | John Frederick William Herschel - Life sciences - 1851 - 572 pages
...variation of the mercury in the tube, that in the cistern will vary contrariwise -tVth of an inch. When the mercury in the tube is above the neutral...difference between it and the neutral point is to be reduced in the proportion expressed by the "capacity" (in the case supposed, divided by 50), and the... | |
 | Military art and science - 1853 - 830 pages
...cistern have been experimentally ascertained, and are marked upon the instrument : thus capacity .yh indicates that for every inch of elevation of the...being added to the observed height, the result will he the corrected height. Or if the mercury at the time of observation should be below the neutral point,... | |
 | John Frederick William Herschel, Robert Main - Science - 1859 - 496 pages
...the tube, that in the cistern will vary contrariwise -»Vth of an inch. When the mercury in the lube is above the neutral point, the difference between it and the neutral point is to be reduced in the proportion expressed by the " capacity " (in the case supposed, divided by 50), and... | |
 | Charles Tomlinson - Winds - 1861 - 408 pages
...constructing the instrument, and are marked upon it together with the neutral point. In such case, when the mercury in the tube is above the neutral point, the difference between it and such point must be divided by the capacity, and the quotient added to the observed height. If the mercury... | |
 | Alfred Wilks Drayson - 1861 - 236 pages
...made in connection with the above, and is done as follows : — If the mercury in the tube should be above the neutral point, the difference between it and the neutral point must be divided by the capacities, and the quotient added to the observed height ; the result will... | |
 | Cassell, ltd - 1869 - 418 pages
...supply the rise in the tube, and higher as at h, when the reading is below the neutral point as at b. When the mercury in the tube is above the neutral...is to be divided by the capacity, and the quotient added to the observed height, to give the correct height. If the mercury is below the neutral point,... | |
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Thus, when the mercury in the tube is above the neutral point, the difference between it and the neutral point is to be divided by the capacity, and the quotient being added to the observed height, the result will be the corrected height. 
