Horizontal Angles

Some articles on horizontal angle, angles, horizontal angles:

Theodolite - History
... circumferentor) and semicircles (see graphometer) were used to obtain either vertical or horizontal angle measurements ... a single instrument that could measure both angles simultaneously ... name "theodolite" described an instrument for measuring horizontal angles only ...

Famous quotes containing the word horizontal:

    I am a sort of martyr, as you see,
    A horizontal monument to patience.
    The calves of waitresses parade about
    My helpless head upon this sodden floor.
    Well, I am down again, but not yet out.
    O sweet frustrations, I shall be back for more.
    Richard Wilbur (b. 1921)