The Philosophical magazine; a journal of theoretical, experimental and applied physics . he phenomenaof fluorescence, advantage should be taken, whenever possible,of this valuable solvent property of castor-oil. XXVIII. The Constant Currents in the Air and in the Sea : anAtteinpt to refer them to a common Cause. By Baron N. Schil-ling, Captain in the Imperial Russian Navy.[Conclurted from p. 10l>.] AS wc are speaking of wave-motion, it will not be out ofplace to mention here a circumstance which will subse-quently be of importance for our argument. It is that the theory of waves, which is c
The Philosophical magazine; a journal of theoretical, experimental and applied physics . he phenomenaof fluorescence, advantage should be taken, whenever possible,of this valuable solvent property of castor-oil. XXVIII. The Constant Currents in the Air and in the Sea : anAtteinpt to refer them to a common Cause. By Baron N. Schil-ling, Captain in the Imperial Russian Navy.[Conclurted from p. 10l>.] AS wc are speaking of wave-motion, it will not be out ofplace to mention here a circumstance which will subse-quently be of importance for our argument. It is that the theory of waves, which is commonly laid as afoundation for all tidal ])hcnomena, has called forth two viewswhich cannot possibly be both together correct. In the firstplace, it is generally assumed that the flood tide rises just as far in the Air and in the Sea. 1G7 above the ordinary sea-level as the ebb sinks below it. Secondly,it is assumed that the middle time between high and low watercorresponds to the normal level. The highest water is formedby the two cusps A and E (fig. 3) of the tidal ellipsoid APES,. and the lowest by the circle P S, which halves the surface of theellipsoid at its minor axis. The normal level will therefore, ac-cording to the common assumption, be found on the circles D Cand F G, which run parallel with the circle P S and are distant45° of arc both from the points A and E and from the circlePS; so that PF = FE and PC = AC; that is, about threehours after flood the normal level, and three hours later the ebbcomes in. On this assumption, however, the superficial spaceof the surfaces A C D and E F G together, occupied by the floodtide, is 2^ times as small as the superficies of the middle zoneC F GD, in which the water stands at the ordinary level. Butsince the water which forms the accumulation of the flood canonly be derived from the ebb-zone, it is clear that, on this assump-tion, the same mass of water must rise considerably more on thesmaller space than the water-surface si
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