Syllabus of Philosophical Lectures, Given During Each Half Year: At Poplar House Academy, January, 1826Plummer and Brewis, 1826 - 92 pàgines |
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Syllabus of Philosophical Lectures, Given During Each Half Year: At Poplar ... Poplar House Academy Visualització completa - 1826 |
Syllabus of Philosophical Lectures Given During Each Half Year at Popular ... London Poplar House Academy Previsualització no disponible - 2016 |
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Pàgina 84 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Pàgina 84 - ... first84. Reduce the first and second terms to the same denomination, and the third term to the lowest denomination in it, then multiply the second and third terms together, and divide their product by the first, the quotient will be the fourth term or answer, in the same denomination vj'ilh the third term.
Pàgina 66 - ... by the vertical. These two horizons, though distant from each other by the semi-diameter of the earth, will appear to coincide, when continued to the sphere of the fixed stars, because the earth, compared with this sphere, is but a point. The sensible horizon is divided into eastern and western. The eastern or ortike horizon is that part of the horizon wherein the heavenly bodies rise.
Pàgina 66 - The situation of a celestial body, when viewed from the surface of the earth, is called its apparent place, and that part of the heavens where it would be seen, if observed at the same time from the centre of the earth, is called its true place. The difference between the true and apparent places is termed the parallax of the object.
Pàgina 84 - ... to the first. Rule. Consider which of the three given terms, is of the same kind with the answer, or number to be found, and put it down the last in the proportion. Then, if it appears, from the nature of the question, that the answer will be greater than this number, put the greater of the other two terms in the middle, and the less first ; but if it will be less, put the less in the middle and the greater first. Having thus stated the question, reduce the two first terms of the proportion,...
Pàgina 66 - ... point in which it would be seen at the same instant from the centre of the earth, is called its true place, the difference between the true and apparent place is called the parallax in altitude.
Pàgina 49 - ... produced will be of a highly pleasing nature. A great propensity to laughter, a rapid flow of vivid ideas, and an unusual fitness for muscular exertion, are the ordinary feelings which it generally produces.
Pàgina 39 - ... metal, which is negative; and the more opposite the metals in these respects, the greater the electrical excitation; and if the metals be placed in the following order, each will become positive by the contact of that which precedes it, and negative by the contact of that which follows it, and the greatest effect will result from the contact of the most distant metals. Platinum Gold, •• Silver, Mercury, Copper, Iron, Tin, Lead, Zinc.
Pàgina 79 - The fixed stars are not all evenly spread through the heavens, but the greater part of them are collected into clusters, of which it requires a large magnifying power, with a great quantity ' of light, to be able to distinguish the stars separately. With a small magnifying power and quantity of light, they only appear small whitish spots, something like a small light cloud, and thence they were called Nebula.
Pàgina 72 - ... varies, from its altering its situation in respect to the sun. The tops of the mountains, on the dark part of the moon, are frequently seen enlightened at a distance from the confines of the illuminated part. The dark parts have, by some, been thought to be seas, and, by others, to be only a great number of...