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)
on lines; and if at a distanceequal to 3 a parallelogram be drawn, it will benine times as large, and so on. Now, as thereis only a given amount of attraction betweenthese diverging lines, it follows that its inten-sity diminishes as the space between these linesincreases ; and, as 1, 4, and 9 are,… … 46 MATTER, FORCE, MOTION, AND MECHANICS. Distances . 1 2 18 4 r> 6 7 8 9 10 1 11 1 12 etc.l Intensity ot iiiVfaclioii i i 1^ -h ^ .1, :i6 4^9- -6^- -sV Ta4 T^T l-riT etc.| Conditions Affecting Terrestrial Gravity. ^S. Gravity affected by altitude.—In accordance with thislaw of attraction, if a…
Physics · Astronomy
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