Olmsted, Denison, 1791-1859. [from old catalog] · New York, R. B. Collins · leaf 77
the sides of the pail in consequence ofthe centrifugal force. The same principleis more strikingly illustrated by the annex-ed cut, (Fig. 15,) which represents anopen glass vessel suspended by a cord at-tached to its opposite sides, and passedthrough a staple in the ceiling of the room.A little… … 96. Why is it so necessary to ascertain accurately the semi-diameter of the earth 1 In how many different ways is thiselement ascertained 1 Specify them. What is meant by thecentrifugal force 1 Give an illustration. Describe figure 15. ASTRONOMICAL INSTRUMENTS. 65 center. The same effect is…
Astronomy
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![An illustration from Io. Bap. Portae Neopolitani de distillatione lib. IX : quibus certa methodo, multipliciq[ue] artificio, penitioribus naturae arcanis detectis, cuius libet mixti in propria elementa resolutio, perfectè docetur (1608)](https://img.insideoutlibrary.com/img/200/ia-iobapportaeneopo00port-43-31.webp)
