The Mirror of Literature, Amusement, and Instruction - Volume 17, No. 490, May 21, 1831 by Various
page 40 of 46 (86%)
page 40 of 46 (86%)
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sovereigns and shillings; but who, in the worst of times, shows his
patriotism by receiving a salary of no less than five thousand pounds a year? _Monthly Magazine._ * * * * * SPIRIT OF DISCOVERY. * * * * * HYDROSTATICS AND PNEUMATICS. (_Cabinet Cyclopaedia_, vol. xvii.) _Easier to swim in the Sea than in a River_. Sea water has a greater buoyancy than fresh water, being relatively heavier; and hence it is commonly said to be much easier to swim in the sea than in a river: this effect, however, appears to be greatly exaggerated. A cubic foot of freshwater weighs about 1,000 ounces; and the same bulk of sea water weighs 1,028 ounces; the weight, therefore, of the latter exceeds the former by only 28 parts in 1,000. The force exerted by sea water to support the body exceeds that exerted by fresh |
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