Ratio of radiation on tilted surface to that of horizontal surfaceS, Angle between the solar collector and the horizontal plane (angle of tilt).
Horizontal surfaces were not their thing, and so they flew on to the bathroom.
Standard carpenters' levels have three vials enabling you to check vertical as well as horizontal surfaces.
The four-inch-wide, two-inch-tall spool can be mounted on vertical or horizontal surfaces, behind or under a desk.
"It starts in the head of the people and manifests somewhere on the floor and on horizontal surfaces in their dwelling units".
Guests may bring drinks of their own, and by the end of the night, beer bottles cover most of the horizontal surfaces.
Ivory fully occupies the place, having colonized most of the horizontal surfaces with stacks of books and papers for new projects.
The overhead lights were yellow, to avoid unwanted exposures, most horizontal surfaces were perforated, and ventilation grates lined the floor, sucking the air.
Many fieldworkers in spraying campaigns have noticed the tendency of resistant flies to rest on horizontal surfaces, which are seldom treated, rather than on walls, which habitually are.
Most clothing hangs from the ceiling, though there are a few beaten-up racks and horizontal surfaces that items are strewn across.
The aircraft was a braced biplane featuring wingtip ailerons, a canard, or forward elevator, a rear rudder, and horizontal surfaces.
