XXVII.—On the Specific Gravity of certain Substances commonly considered lighter than Water
1844 ◽
Vol 15
(3)
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pp. 387-395
Keyword(s):
That the common varieties of wood which float in water, owe their apparent lightness to air contained in their structure, is generally admitted by those who have paid any attention to the subject. By means of the air-pump, the fact is clearly demonstrated. Under the exhausted receiver, after a certain time, the time varying with the quality of wood, all the different specimens which I have tried have sunk; I may mention two or three in particular, as examples. A piece of oak, weighing 29.7 grs., sank in distilled water, after having been subjected to the air-pump three days;—a piece of deal, weighing 16.3 grs., similarly acted on, floated ten days;—and a portion of the pith of the elder, weighing only .133 grain, floated seven days.
1845 ◽
Vol 1
◽
pp. 424-426
1803 ◽
Vol 93
◽
pp. 195-199
Keyword(s):
2017 ◽
Vol 6
(1)
◽
pp. 305
Keyword(s):
Keyword(s):
2015 ◽
Vol 3
(5)
◽
pp. 82-90
Keyword(s):
2016 ◽
Vol 2
(2)
◽
pp. 81