Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
the right. The three arrows represent the attraction of the moon uponthe water of the earth. If the water were thus drawn to only one sideof the earth, there could be but one flood and one ebb tide in 24 hours;whereas there are Uoo of each. 917. Figure 17.—The t-wo tide-waves. — Instead of onlyone… … the opposite tide-wave will be explained hereafter,these two high tides there are two loiu tides. 30 Half-way between 466 ASTRONOMY. These four tides, viz., two high and two low, traverse the ocean fromeast to west every day, which accounts for a flood and ebb tide everytwelve hours. On the right…
Physics · Astronomy
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