Miscellaneous PapersSuperintendent of Government Printing, India, 1903 - 50 стор. |
Загальні терміни та фрази
aberration alloys calculation Calcutta central spot centre chromatic aberration coefficient Colonel comparison cone considered corresponding crater curve Damukdia determined dial plate diameter difference of longitude disc distance dw dw edge elementary pencils employed equal error Everest expansion focal length focal lines focus foot-screws formula Geodesy geodetic glass hour angle illumination produced inch instrument intensity of illumination intrinsic brightness invar Kaliánpur Lambert's law lens lenses in echelon levelling staff longitude of Madras luminous intensity luminous power Madras Observatory Mangin Mangin mirrors mean measured meridian method metres millimetres millioniemes nickel nickel-steel observations obtained optic axis parabolic mirrors photometry pillars placed plane practice projector radius rays reflection refracting river scale sensibly slit source of light spherical standard staves sun-dial surface Survey of India theodolites theoretical thickness triangulation Trigonometrical Survey value of longitude variations vertical angles Warren's value zero line zone ΔΙ
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Сторінка 3 - Account of the Operations of the Great Trigonometrical Survey of India 'J.
Сторінка 13 - ... fused silica flat C forms an accurately smooth base so that the fringe spacing can be altered by the rotation of T and A relative to S and B. Both the tube T and sample <S have three projecting points on each end to act as well-defined points of contact. By using this arrangement the optical path, between the lower surface of A and the upper surface of B in which the interference takes place, is kept small while the .sample length is large. In the final arrangement, 4-49 g of glass of length...
Сторінка 41 - ... as the source at the corresponding point multiplied by the coefficients of transmission, k, and of optical effect, u.
Сторінка 31 - If ds be the section of an emergent pencil by a plane perpendicular to the optic axis, that is to...