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)
small ellipses,the moons orbit. When the moon is in quadrature, as seen in her orbit ASTRONOMY. 469 at N and T, her influence is measurably neutralized by the sun, caus-ing low tides, called yieap tides. These will occur at both quadraturesof the moon. When the moon is in conjunction or opposition,… … conjunction, twice in quadrature, and once in opposition, there will betwo neap and two spring tides during every lunation. Thus: springtide at conjunction, neap tide at first quarter, spring tide again at op-position, and neap tide again at second quarter. 924. Variations in the spring tides (Fig.…
Physics · Astronomy
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