He considered, at every instant, the actual motion of a stratum as composed of a motion which it had in the preceding instant and of a motion which it had lost; and the laws of equilibrium between the motions lost furnished him with equations representing the motion of the fluid.
This method necessitates the use of very considerable pumping power during the sinking, as the water has to be kept down in order to allow the sinkers to reach a water - tight stratum upon which the foundation of the tubbing FIG.
But by laying bare in 1884 the upper stratum of remains on the rock of Tiryns (q.v.), Schliemann made a contribution to our knowledge of prehistoric domestic life which was amplified two years later by Chr.
He nominates the Sheikh ul-Islam or mufti (q.v.) of Constantinople (grand mufti), who is his representative in the imamate and issues judgments in points of faith and law from which there is no appeal; but the nomination must fall on one of the mollahs, 2 who form the upper stratum of the hierarchy of ulema.
From this stratum came also various fragments of bas reliefs of high artistic excellence.
The discovery of a single fossil creature in a geological stratum of a wrong period, the detection of a single anatomical or physiological fact irreconcilable with origin by descent with modification, would have been destructive of the theory and would have made the reputation of the observer.
The original top stratum is the purest, and each succeeding lower stratum has a greater proportion of impurities; the lowest consists largely of a solid or semi-solid alloy of tin and iron.
The rippled stalks are tied in small bundles and packed, roots downwards, in the dams till they are quite full; over the top of the upper layer is placed a stratum of rushes and straw, or sods with the grassy side downwards, and above all stones of sufficient weight to keep the flax submerged.
Another stratum is represented by the story of a favourite of the gods known as Ut-Napishtim, who is saved from a destructive storm and flood that destroys 1 The name of the hero, written always ideographically, was for a long time provisionally read Izdubar; but a tablet discovered by T.
The famous Venetian pozzi, or wells for storing rain-water from the roofs and streets, consisted of a closed basin with a water-tight stratum of clay at the bottom, upon which a slab of stone was laid; a brick shaft of radiating bricks laid in a permeable jointing material of clay and sand was then built.