from The Century Dictionary.
- noun In surveying, the reading of a leveling-rod, taken when looking back to a station which has been passed. All other readings are called
- noun The rear sight of a gun.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Surv.) The reading of the leveling staff in its unchanged position when the leveling instrument has been taken to a new position; a sight directed backwards to a station previously occupied. Cf.
foresight, n., 3.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The rear sight of a
- noun surveying A measurement or reading taken back towards a point of known
elevation, used to calculate the height of the theodolite.
- noun surveying A measurement of a previously shot point, used to set the angle to zero when
occupyinga new position.
- verb surveying To
from Wiktionary, Creative Commons Attribution/Share-Alike License
The swan-neck cock made a slight creaking noise as it compressed the mainspring, then there was a click as the pawl took the strain and Hagman hinged the backsight up as high as it would go, then lined its notch with the blade-sight dovetailed at the muzzle.
Sharpe aimed through the bars of the balcony's balustrade, lining the notch in the rifle's backsight and the leaf of the foresight on Aksel Bang's face.
Both a foresight and backsight are taken on the point.
This is a point used primarily to serve as a reference elevation to move the instrument, Both a foresight and backsight are taken on the point.
Kitchener himself may have placed 'em just so, with D'Israeli's sanction, The Times 'blessing, and the Queen waving 'em good-bye — but now it's their grip on the stock, and their eye at the backsight, and if they break, you're done.
Kitchener himself may have placed 'em just so, with D'Israeli's sanction, The Times 'blessing, and the Queen waving 'em good-bye - but now it's their grip on the stock, and their eye at the backsight, and if they break, you're done.
Harper raised his first rifle, snapped the backsight into the upright position, and guessed the horsemen were three hundred yards away.
It was undoubtedly a very old one, with the open U-shaped backsight which he'd heard of, but never seen.
Of course, we've got a pretty short back-line to sight on, but the shift is more than a hundred times as great as the possible error in backsight could account for, and there's apparently nothing either regular or systematic about it that I can figure out.
The tiny figures seen over the slide of the backsight seemed a little larger, but also fewer at each successive volley.