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Recumbent stone circle
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Unique scottish and irish circle with one large stone lying horizontally between two uprights
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Horizontally, английский
Точность плюс-минус з см по вертикали и горизонтали ~ of separation точность разделения (зернистого материала на фракции)
Horizontal, английский
- Горизонталь; горизонтальный
- Горизонталь; горизонтальный 287
- At right angles to the direction of gravity; on the level; parallel to the horizon; neither vertical nor inclined.
- A direction parallel to the horizon, or what is commonly termed lying flat. one of the greatest inconveniences navigators have to struggle with is the frequent want of a distinct sight of the horizon. to obviate this a horizontal spinning speculum was adopted by mr. lerson, who was lost in the victory man-of-war, in which ship he was sent out to make trial of his instrument. this was afterwards improved by smeaton, and consists of a well-polished metal speculum about 3-1/2 inches in diameter, inclosed within a circular rim of brass, so fitted that the centre of gravity of the whole shall fall near the point on which it spins. this is the end of a steel axis running through the centre of the speculum, above which it finishes in a square for the convenience of fitting a
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Obsidian, английский
- Very hard volcanic glass used for tools. it can be dated by measurement of thickness of its hydration layer on surface
- A black or dark-colored volcanic glass, usually of rhyolitic (felsic) composition.
- A natural volcanic glass, usually black, with a bright luster; has relatively low water content.
Stalled cairn, английский
Tomb-type found in the orkney islands which is very similar to the gallery grave design. the main chamber usually runs the length of the cairn and has lateral slabs (stalls) projecting from the chamber wall. these stalls divide the tomb into compartments
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