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Page iii - To give a stronger impulse and a more systematic direction to scientific inquiry, — to promote the intercourse of those who cultivate Science in different parts of the British Empire, with one another and with foreign philosophers, — to obtain a more general attention to the objects of Science, and a removal of any disadvantages of a public kind which impede its progress.
Page 86 - From the foregoing statements it may be safely inferred that " the mean height of the barometer at the level of the sea being the same in every part of the globe...
Page 188 - The strength of a pillar, with one end round and the other flat, is the arithmetical mean between that of a pillar of the same dimensions with both ends round, and one with both ends flat. Thus, of three cylindrical pillars, all of the same length and diameter, the first having both its ends rounded, the second with one end rounded and one flat, and the third with both ends flat, the strengths are as 1 , 2, 3 nearly.
Page 18 - When the air near the surface of the earth becomes more heated or more highly charged with aqueous vapor, which is only fiveeighths of the specific gravity of atmospheric air, its equilibrium is unstable, and up-moving columns or streams will be formed. As these columns rise, their upper parts will come under less pressure, and the air will therefore expand ; as it expands, it will grow colder about one degree and a quarter for every hundred yards of its ascent, as...
Page 189 - In similar pillars, or those whose length is to the diameter in a constant proportion, the strength is nearly as the square of the diameter, or of any other linear dimension ; or, in other words, the strength is nearly as the area of the transverse section." " In hollow pillars, of greater diameter at one end than the other, or in the middle than at the ends, it was not found that any additional strength was obtained over that of cylindrical pillars.
Page 152 - In many of the houses there is scarcely any ventilation; dunghills lie in the vicinity of the dwellings; and from the extremely defective sewerage, filth of every kind constantly accumulates.
Page xii - Human Species, by JC Prichard, MD, FRS, &c. On the advances which have recently been made in certain branches of Analysis, by the Rev.
Page 18 - The ascending columns will carry up with them the aqueous vapor which they contain, and if they rise high enough, the cold produced by expansion from diminished pressure, will condense some of this vapor into cloud ; for it is known that cloud is formed in the receiver of an air-pump when the air is suddenly withdrawn. The distance or height to which the air will have to ascend before it will become cold enough to begin to form cloud, is a variable quantity depending on the number of degrees which...