A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 137
from the earths center,ia represented at A in the above, and also in the next cut. 280. How many tide-waves are there on the globe, and how situated ? 281. State the principal cause of the wave opposite the moon ? (Demon-strate by diagram.) 282. What other cause operates with the one just stated to… … SECONDARY CAUSE OF HIGH TIDE OPPOSITE THE MOON. I ) t. The point A represents the center of gravity between the earh and moon ; and asis this point which traces the regular curve of the earths orbit, it is represented inthe arc of that orbit, while the earths center is 6,000 miles one side of it.…
Astronomy
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