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  2. Levelling - Wikipedia

    en.wikipedia.org/wiki/Levelling

    Turning is a term used when referring to moving the level to take an elevation shot from a different location. To "turn" the level, one must first take a reading and record the elevation of the point the rod is located on. While the rod is being kept in exactly the same location, the level is moved to a new location where the rod is still visible.

  3. Level (optical instrument) - Wikipedia

    en.wikipedia.org/wiki/Level_(optical_instrument)

    The Y level or wye level is the oldest and bulkiest of the older style optical instruments. A low-powered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main telescope. The term dumpy level (also builder's level) endures despite the evolution in design. They ...

  4. Topographic Abney level - Wikipedia

    en.wikipedia.org/wiki/Topographic_Abney_Level

    In 1914 and 1915, the Forestry Quarterly published a series of articles on the use of the Abney level. [6] [7] [8] These tutorial articles remain useful today, but the primary reference for usage is the 1927 Abney Level Handbook. [3] The Abney level is typically used at the eye height of the surveyor, either hand-held or mounted on a staff at ...

  5. Rokkor - Wikipedia

    en.wikipedia.org/wiki/Rokkor

    The first lens to carry the Rokkor designation was a 200mm f / 4.5 lens that came with the hand-holdable aerial camera Chiyoda SK-100 in 1940. [1] After the Rokkor name was dropped and no longer engraved in new lenses after 1980/1981, [1] the Rokkor name resurfaced two times.

  6. 30 Movie Mistakes You Missed That May Change The Way You ...

    www.aol.com/lifestyle/49-screen-movie-tv-show...

    Image credits: zenee #3 Starbucks Cup In Front Of Daenerys. During the scene in the banquet hall, as Tormund says "most people get bloody murdered, they stay that way", look at Daenerys in the ...

  7. These fish are the best and worst for your health, say experts

    www.aol.com/fish-best-worst-health-experts...

    800-290-4726 more ways to reach us. Sign in. Mail. ... "Salmon is among the best choices for healthy fish. ... "A 4-or-5-year-old child should eat only about four ounces of light tuna per week ...

  8. Guide number - Wikipedia

    en.wikipedia.org/wiki/Guide_number

    Cameras with focal-plane shutters—even if they had PC connectors with X, F, M, or S-sync delays ("xenon sync" with zero delay and flashbulbs with peak delays of 5, 20, and 30 ms)—could not be used at speeds that attenuated guide numbers with most types of flashbulbs because their light curves were characterized by rapid rise and fall rates; the second shutter curtain would begin wiping ...

  9. Israel investigating after Hamas releases photos purportedly ...

    www.aol.com/israel-investigating-hamas-releases...

    Israel says it is investigating after Hamas released photos purportedly showing the body of a female hostage in Gaza. Speaking during his weekly cabinet meeting on Sunday, Prime Minister Benjamin ...