Pivoted with the glass dial and flat ring is a horizontal bar carrying at both of its extremes a sight vane.
"Lectures in Navigation"
Ernest Gallaudet Draper
They sometimes, however, retain a horizontal position over a large tract of country.
"Geology"
James Geikie
The short shaft carrying the bevel gears is now in a horizontal position instead of vertical.
"Illustrated Catalogue of Cotton Machinery"
Howard & Bullough American Machine Company, Ltd.