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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D. Appleton, 1869 - Physics - 450 pages
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Page 34 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
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 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 34 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle.
Page 238 - ... 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 376 - 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 381 - The vicissitudes of the seasons are caused by the annual revolution of the earth around the sun, together with the inclination of its axis to the plane of its orbit. It has already been explained, that the ecliptic is the plane of the earth's orbit, and is supposed to be placed on a level with the earth's horizon, and hence, that this plane is considered the standard, by which the inclination of the lines crossing the earth, and the obliquity of the...
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 94 - These simple machines are the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw.
Page 104 - With the wheel and axle, intensity of force is gained, and time is lost, in proportion as the circumference of the wheel exceeds that of the axle. Thus, in Fig. 103, if the circumference of the wheel B is five feet and that of the axle A one foot, a power of 40 pounds at P will counterbalance a weight of 200 pounds at W, and of course lift any thing under 200 pounds. 220. DIFFERENT FORMS.—The wheel and axle is extensively used, and assumes a variety of forms. Fig. 104. Instead of having a rope...

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