 | Frederick Walter Simms - 1834 - 124 páginas
...diameter is measured and when his altitude is taken with an artificial horizon, the attached darkglasses ought not to be used : instead of them, those which...of the index, it must be removed, for the time, by taking out the finger- screw, which fastens it to the body of the circle. " If it should happen that... | |
 | Frederick Walter Simms - 1834 - 134 páginas
...those errors, be less distinct than the latter. " In taking distances, when the position does not vajry from the vertical above thirty or forty degrees, the...of the index, it must be removed, for the time, by taking out the finger- screw, which fastens it to the body of the circle. " If it should happen that... | |
 | Frederick Walter Simms - 1844 - 178 páginas
...or artificial horizon, they being no more than distances taken in a vertical plane. Meridian altithe same day, because there is not time : all therefore...of the index, it must be removed, for the time, by taking out the finger-screw, which fastens it to the body of the circle. " If it should happen that... | |
 | Benjamin Pike - 1848 - 356 páginas
...observations, will be the true latitude ; but in these there should be no application of index-error, for that being constant, the result would in some...of the index, it must be removed, for the time, by taking out the finger-screw, which fastens it to the body of the circle. If it should happen that two... | |
 | Benjamin Pike (Jr.) - 1848 - 482 páginas
...observations, will be the true latitude ; but in these there should be no application of index-error, for that being constant, the result would in some...of the index, it must be removed, for the time, by taking out the finger-screw, which fastens it to the body of the circle. If it should happen that two... | |
 | John Fry Heather - 1849 - 202 páginas
...to read them off on different branches of the index. Also make three observations backwards, using the same caution ; a mean of these will be the distance...of the index, it must be removed, for the time, by taking out the finger screw, which fastens it to the body of the circle. " If it should happen that... | |
 | John F. Heather - 1849 - 208 páginas
...thereby. " When both the reflected and direct images require to he darkened, as is the case when the sun-s diameter is measured, and when his altitude is taken...of the index, it must be removed, for the time, by taking out the finger screw, which fastens it to the body of the circle. " If it should happen that... | |
 | Frederick Walter Simms - 1850 - 184 páginas
...forwards one day and backwards the next, and so on alternately from day to day : the mean of altitudes, deduced severally from such observations, will be...of the index, it must be removed, for the time, by taking out the finger-screw, which fastens it to the body of the circle. " If it should happen that... | |
 | Sir Henry Edward Landor Thuillier - 1851 - 826 páginas
...observations, will be the true latitude ; but in these there should be no application of index-error, for that being constant, the result would in some...of the index, it must be removed, for the time, by taking out the finger-screw, which fastens it to the body of the circle. " If it should happen that... | |
 | John Fry Heather - 1851 - 208 páginas
...application of index error, for that being constant, the result would in some measure be vitiated thereby. u When both the reflected and direct images require...of the index, it must be removed, for the time, by taking out the finger screw, which fastens it to the body of the circle. " If it should happen that... | |
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... for that being constant, the result would in some measure be vitiated thereby. " When both the reflected and direct images require to be darkened, as is the case when the sun's diameter is measured, and when his altitude is taken with an artificial... 
