Recherche Images Maps Play YouTube Actualités Gmail Drive Plus »
Connexion
Livres Livres
" ... staff-reading are again likely to cancel themselves, except perhaps in working in a meridional direction, when, one staff being invariably more illuminated than the other, these errors become cumulative. The most probable source of personal error... "
Tables of Heights in Sind, the Punjab, N.W. Provinces and Central India ... - Page 23
de India. Great Trigonometrical Survey - 1863 - 196 pages
Affichage du livre entier - À propos de ce livre

Aid to Survey Practice for Reference in Surveying, Levelling, and Setting Out

Lowis D'Aguilar Jackson - 1880 - 382 pages
...cumulative. The most probable source of personal error is in reading the bubble. The observer generally gets a side view of the bubble refracted obliquely through the thickness of the glass tube, which is not so clear as the view from above. The rim round the bubble caused by the adhesion of the liquid...
Affichage du livre entier - À propos de ce livre

Aid to survey-practice

Lowis d'Aguilar Jackson - 1880
...cumulative. The most probable source of personal error is in reading the bubble. The observer generally gets a side view of the bubble refracted obliquely through the thickness of the glass tube, which is not so clear as the view from above. The rim round the bubble caused by the adhesion of the liquid...
Affichage du livre entier - À propos de ce livre

Proceedings of the Asiatic Society of Bengal ...

1882
...the sun or opposite to the ^sun. Owing to the level being placed above the telescope, the observer gets a side view of the bubble, refracted obliquely...through the thickness of the glass tube, which is not so sharply defined as the lookdown view from above. The rim round the bubble, caused by the adhesion...
Affichage du livre entier - À propos de ce livre

Proceedings of the Royal Geographical Society and Monthly Record ..., Volume 4

1882
...when the general direction of the lines of levels is towards the sun or opposite to it the observer gets a side view of the bubble, refracted obliquely through the thickness of the glass tube, and is thus inclined to regard the outer edge of the rim of the bubble at the end nearer the light...
Affichage du livre entier - À propos de ce livre




  1. Ma bibliothèque
  2. Aide
  3. Recherche Avancée de Livres
  4. Télécharger ePub
  5. Télécharger le PDF