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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)

Johnson, Frank G., 1835- · Chicago, A.H. Andrews · leaf 448

An illustration from 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, leaf 448
e ellipticity of the moons orbit, and the consequent in-equality of her angular velocity, she appears to roll a little on her axisfrom east to west, and west to east. This is called her lihration inlo7igitude. The axis of the moon is inclined to the plane of her orbit only aboutone and a half… … 859. Figure 14.—The actual path of the moon is shownby the line, H, F, A, K. Suppose the dotted line to represent a part 442 ASTRONOMY. of the earths orbit. At H the moon crosses the eartlis track 240,000miles behind the earth. Gaining on the earth, she passes it in 7 daysat F, as a full moon.…

Physics · Astronomy

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