This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873 Excerpt: ...above the surface, since s does not t'c weigh so much under water as above it. The weights that have to be now placed on c, to bring t back to its proper level, show what s has lost by being placed in water, and so shows what an equal volume of water weighs. The ratio of the weight of s in air to the weight of an equal ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873 Excerpt: ...above the surface, since s does not t'c weigh so much under water as above it. The weights that have to be now placed on c, to bring t back to its proper level, show what s has lost by being placed in water, and so shows what an equal volume of water weighs. The ratio of the weight of s in air to the weight of an equal volume of water is its specific gravity. 49. Hydrometers of Variable Immersion.--In all the instruments for ascertaining specific gravity hitherto described, the same principle has obtained of noticing what weight has been required to restore the hydrometer to its normal position. But evidently the same result might be attained by noticing how far the instrument is raised or depressed by an increase of its own weight, or of density in the liquid in which it is immersed. Thus, a hollow cylindrical body, a, may have a stem, b, so graduated as to show the relative specific gravity of a liquid in which it is placed. If the liquid be heavier than water, the hydrometer will not sink so deeply, Fig. 65. since a less quantity of the liquid will balance its weight; if it be lighter, the instrument will sink more deeply than in water. The stem may be graduated (by actual experiment, after the manner of a thermometer) so as to show by simple inspection the specific gravity of the liquid. 50.--The Specific Gravity Bottle.--If the substance to he weighed be a powder, none of the methods already mentioned are exactly applicable. One way would be to fill a bottle of known capacity with the powder and to compare the weight with that of the same bottle full of water. But it is difficult to say when a bottle is fairly full of a powder, which is so much more capable of compression than a liquid. The plan usually adopted, therefore, is to weigh both some given q...
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Add this copy of An Elementary Handbook of Theoretical Mechanics to cart. $42.69, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2010 by Nabu Press.
