A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life : Adapted to Use with Or Without Apparatus and Accompanied with Full Descriptions of Experiments, Practical Exercises, and Numerous Illustrations |
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angle aphelion apparatus applied atmosphere attraction axis axle ball battery body called centre of gravity centrifugal force colors concave condensed conductor connected convex convex lens cylinder Describe discharged distance earth earth's surface effect elastic electric current electricity electro-magnet equal experiment fall feet fluid force friction galvanic Give an example glass heat Illustrate inches inclined plane instrument iron kind latter lever Leyden jar light liquid machine magnet mercury metallic miles mirror Moon motion move needle north pole object orbit particles pass pendulum perihelion piece piston planet plate polarized pole position pounds pressure prime conductor principle produced pulley raised rays reflected refracted represented in Fig resistance revolve screw shown in Fig solid sound specific gravity stars steam striking substances temperature tion transmitted tricity tube turned Uranus valve velocity vessel vibrations voltaic weight wheel wire zinc
Popular passages
Page 34 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Page 377 - Venus a pea, on a circle 284 feet in diameter; the Earth also a pea, on a circle of 430 feet; Mars a rather large pin's head, on a circle of 654 feet...
Page 46 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Page 173 - The marine barometer has not yet been in general use for many years, and the author of this work was one of a numerous crew who probably owed their preservation to its almost miraculous warning. It was in a southern latitude ; the sun had just set with placid appearance, closing a beautiful afternoon, and the usual mirth of the evening watch was proceeding, when the captain's order came to prepare with all haste for a storm. The barometer had began to fall with appalling rapidity.
Page 300 - Leyden, of much eminence, said that " he felt himself struck in his arms, shoulders, and breast, so that he lost his breath ; and it was two days before he recovered from the effects of the blow and the terror ; adding, that he would not take a second shock for the kingdom of France.
Page 36 - CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.
Page 35 - The circumference of every circle is divided into 860 equal parts, called Degrees. One fourth of the circumference contains 90 degrees, and is called a Quadrant. 11. An Angle is the difference in direction of two straight lines that meet or cross each other. 12. The Vertex (plural, vertices) of an angle is the point at which its sides meet; as, D in Fig.
Page 174 - In that awful night, but for the little tube of mercury which had given the warning, neither the strength of the noble ship, nor the skill and energies of the commander, could have saved one man to tell the tale.
Page 184 - Experiments.—In a vacuum, boiling commences at a much lower temperature than in the air. This is shown by placing some hot water under a receiver and exhausting the air. The pressure of the atmosphere being removed from its surface, the water soon boils; but it comes to rest the moment that air is readmitted. For the same reason, water boils at a lower temperature on the top of a mountain than at its base, as has often been observed by travellers. 442. If beer is placed under a receiver and the...
Page 392 - A man placed on one of them would spring with ease 60 feet high, and sustain no greater shock in his descent than he does on the earth from leaping a yard. On such planets giants might exist; and those enormous animals, which on earth require the buoyant power of water to counteract their weight, might there be denizens of the land.