File:A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics - comprising a popular view of the present state of knowledge - illustrated by numerous engravings, (14758961876).jpg

Identifier: londonencyclopae05curt (find matches)
Title: A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams
Year: 1829 (1820s)
Authors: Curtis, Thomas, fl. 1820
Subjects: Encyclopedias and dictionaries Aeronautics
Publisher: London : Thomas Tegg
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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diameter, and torepresent the inner surface of either of the twoends of the drum, which may be made of any ofthe unoxidable metals; then, if we conceiveseven metallic partitions, F f, Gg, H//, I i, Kk,LI, and M m, to be closely soldered to both endsof the drum, in the sloping direction indicatedby the figure, where the black lines are equidis-tant tangents to the small dotted circle of an inchand half diameter at the points J\ g, h, &c.j it isevident, that any small quantity of water intro-duced into the drum would fall into two, or atmost three, of the lower compartments, andwould remain there until some external forceshould alter the position of the drum, supposingin this case the cords tied fast to the arbor; butwe have said that they are wound round the cir-cumference of an arbor, that has a sensible dia-meter, suppose one-eighth of an inch; then fore,they are removed one-sixteenth of an inch, orupwards, if we take their thickness into the ac- c :, e p§ v !) k/.•. Fur. -/.
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Zoiulon fiihlis/inf In, rhomajltgp. TJ.OuapsiJc Jiuauopi 1927- J SIiui-v Srulp1 CLEPSYDRA. 767 count, from the centre of the drum, which wouldalso be in its centre of gravity, if it were empty,on which account it would, in that case, revolveto the left, in the direction F G II downwards,from the cord being at the remote side of thecentre, as represented by NO; but conceive thewater to be included now and then, it would beelevated to the right, till its weight became acounterpoise to the gravity of the heavier side ofthe drum, in which situation all motion wouldcease, and the drum would remain, suspended,indeed, by the cords, but in a state of equilibrio.Conceive again a small hole perforated in thepartition pressed upon by the water near the cir-cumference of the large circle, and also at thepoints F, G, H, I, K, L, M, and the consequencewill be, that the water will first force its wayslowly through the perforation at K, from themore elevated to the lower compartment, whicheffect will

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