Ball, R[obert] S[tawell], Sir, 1840- [from old catalog] · New York, H. Holt and company · leaf 94
e towers at pqrs theywill fall on the pointsabcd respectively. Thefour stones will move inthe direction of the arrows.From p to a the stonemoves in an opposite direc-tion to the motion from rto c, and from q to b it moves from right to left,while from s to d it moves from left to right.… … 76 Astronomy. excite in us any astonishment, and rarely even pro-vokes our curiosity. A clap of thunder, which everyone notices, though much less frequent is not reallymore remarkable. We all look with attention uponthe attraction of a piece of iron by a magnet, andjustly so, for the phenomenon is…
Astronomy
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