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)
o on. If, then, the ellipse be divided into twelve equalareas, answering to the twelve months, the earth will pass through anequal area every month, but the space through which it passes in itsorbit will be decreased during every month from the perihelion (at S)to the aphelion (at T), and increased… … dicular to each other, its motion will be in a diagonal direction betweenthe directions of the two forces. Let S represent the sun, and E, the earth. Draw the line, E, and the ASTRONOMY. 433 line L, perpendicular to R. If the earth were moving in the directionof L, with a velocity that would carry…
Physics · Astronomy
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