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" ... ends of the bubble. When light falls obliquely on the instrument, the outer edge of the rim, towards the light, is more clearly defined than the inner, while at the opposite end of the bubble, the inner edge of the rim is most clearly defined ; hence... "
Tables of Heights in Sind, the Punjab, N.W. Provinces and Central India ... - Page 23
de India. Great Trigonometrical Survey - 1863 - 196 pages
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Minutes of Proceedings of the Institution of Civil Engineers, Volume 44,Partie 2

Institution of Civil Engineers (Great Britain) - 1876
...falls obliquely on the instrument, the outer edge of the rim towards the light is more clearly defined than the inner, while at the opposite end of the bubble the inner edge is most clearly defined. Hence there is a tendency to bring the bubble too much towards the light,...
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Minutes of Proceedings of the Institution of Civil Engineers, Volume 44

1876
...falls obliquely on the instrument, the outer edge of the rim towards the light is more clearly defined than the inner, while at the opposite end of the bubble the inner edge is most clearly defined. Hence there is a tendency to bring the bubble too much towards the light,...
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Aid to Survey Practice for Reference in Surveying, Levelling, and Setting Out

Lowis D'Aguilar Jackson - 1880 - 382 pages
...the sides of the tube becomes so prominent, that its extremities may be read, instead of the actual ends of the bubble. When light falls obliquely on...bubble, the inner edge of the rim is most clearly denned ; hence there is a tendency to bring the bubble too much towards the light, and to give the...
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Aid to survey-practice

Lowis d'Aguilar Jackson - 1880
...obliquely on the instrument, the outer edge of the rim, towards the light, is more clearly defined than the inner, while at the opposite end of the bubble,...the inner edge of the rim is most clearly defined ; hence there is a tendency to bring the bubble too much towards the light, and to give the readings...
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Proceedings of the Asiatic Society of Bengal ...

1882
...light, the outer-edge of the rim at the end of the bubble towards the light is more clearly defined than the inner, while at the opposite end of the bubble the inner-edge of the rim is more clearly defined than the outer. Consequently there is a tendency to assume...
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