INTRODUCTORY COURSE OF NATURAL PHILOSOPHY FOR THE USE OF SCHOOLS AND ACADEMICS, EDITED FROM GANOT'S POPULAR PHYSICS

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Page 150 - Archimedes stated that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
Page 149 - A body immersed in a liquid is buoyed up by a force equal to the weight of the liquid displaced by it.
Page 40 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Page 219 - The heat which is expended in changing a body from the solid to the liquid state, or from the liquid to the gaseous state, is called latent heat.
Page 275 - The following definitions apply equally to concave and convex mirrors : The middle point of the mirror is called its vertex. The centre of the sphere, of which the mirror forms a part, is called the optical centre.
Page 37 - Between the power and velocity? that there is a loss of power in using a lever of the third class, and a gain of power in using one of the second class. In performing any work with a lever, the paths passed over by the points of application of the power and resistance are proportional to their lever arms ; that is, the longer the lever arm the greater the path passed over, and the greater its velocity. This is expressed by saying, that what is gained in power is lost in velocity. It is for this reason...
Page 188 - ... air and the smallness of the tube. The bulb is therefore heated, when the air within expands, and a portion escapes in bubbles through the mercury. On cooling, the pressure of the external atmosphere forces a quantity of mercury through the tube into the bulb. By repeating this operation a few times, the bulb and a portion of the tube are filled with mercury. The whole is then heated till the mercury boils, thus filling the tube, when the funnel is melted off and the tube hermetically sealed...
Page v - It is charcterized by a well-balanced distribution of subjects, a logical development of scientific principles, and a remarkable clearness of definition and explanation. In addition, it is profusely illustrated with beautifully executed engravings, admirably calculated to convey to the mind of the student a clear conception of the principles unfolded. Their completeness and accuracy are such as to enable the teacher to dispense with much of the apparatus usually employed in teaching the elements...
Page 98 - Hence, the weight lost or supported by the water, is the weight of a volume of water equal to that of the body immersed.
Page 16 - PHYSICS. poured into the upper cup, and the air exhausted from the tube, the mercury, being pressed down by the external air, is seen falling through the leather in small drops like rain. Gold was shown to be porous by some Florentine philosophers in the following manner. A hollow sphere of gold was filled with water and tightly closed, after which it was subjected to great pressure. The water was seen to issue from the globe and form on its surface like dew. The experiment has since been repeated...

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