elementary treatise on nautral philosophy1873 |
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Página xi
... telescope . - Determination of values of divisions on spirit - level . - Heights of different liquids in communicating vessels . - Capillarity . - Surface of a liquid not horizontal near sides of vessel . — Capillary elevation and ...
... telescope . - Determination of values of divisions on spirit - level . - Heights of different liquids in communicating vessels . - Capillarity . - Surface of a liquid not horizontal near sides of vessel . — Capillary elevation and ...
Página xxii
... telescope is equal to brightness of object . — Effective brightness is the same , if magnifying power does not exceed and is less for higher powers . - Actual telescopes always give images less bright than the objects . - Brightness of ...
... telescope is equal to brightness of object . — Effective brightness is the same , if magnifying power does not exceed and is less for higher powers . - Actual telescopes always give images less bright than the objects . - Brightness of ...
Página 59
... telescope . The time of vibration , then , does not depend on the amplitude , and neither does it depend on the material of which the pendulum is composed . From this last fact it follows that gravity acts in precisely the same manner ...
... telescope . The time of vibration , then , does not depend on the amplitude , and neither does it depend on the material of which the pendulum is composed . From this last fact it follows that gravity acts in precisely the same manner ...
Página 125
... its first position , and the bubble is brought between the marks by means of the third screw ; this second operation cannot disturb the. Fig . 95. - Testing the Horizontality of a Surface . Fig . 96. - Spirit - level with Telescope .
... its first position , and the bubble is brought between the marks by means of the third screw ; this second operation cannot disturb the. Fig . 95. - Testing the Horizontality of a Surface . Fig . 96. - Spirit - level with Telescope .
Página 126
... Telescope . - In order to apply the spirit- level to land - surveying , an apparatus such as that represented in the figure is employed . Upon a frame AA , movable about a vertical axis B , are placed a spirit - level nn , and a telescope ...
... Telescope . - In order to apply the spirit- level to land - surveying , an apparatus such as that represented in the figure is employed . Upon a frame AA , movable about a vertical axis B , are placed a spirit - level nn , and a telescope ...
Términos y frases comunes
acid action amount angle apparatus atmosphere atmospheric pressure axis barometer battery body Boyle's law called calorimeter carbonic acid centre of gravity circuit coil column compressed condensation conductor connected consists copper cylinder denote density diminished direction distance earth effect electricity electro-motive force employed equal equilibrium expansion experiment formula gases given glass globe Hence horizontal hygrometer inch increase instrument insulated latent heat length lens Leyden jar light liquid lower machine magnet means measured mercury metal millimetres mirror motion needle negative observed obtained opposite parallel particles passes pendulum piston placed plane plate pole portion position potential pressure produced proportional quantity ratio rays reflected refraction represented in Fig resistance result rotation side solid specific gravity specific heat steam substance sulphuric acid suppose surface telescope temperature tension thermometer tion tube vapour velocity vertical vessel vibrations volume weight wire zinc
Pasajes populares
Página 286 - Its banks and its bottom are of cold water, while its current is of warm. The Gulf of Mexico is its fountain, and its mouth is in the Arctic seas. It is the Gulf Stream. There is in the world no other such majestic flow of waters. Its current is more rapid than the Mississippi or the Amazon, and its volume more than a thousand times greater.
Página 499 - It is better, on this account, in graduating the bottle, to make two scratches as represented in the drawing, one at the top and the other at the bottom of the curve : this prevents any future mistake.
Página 437 - Q are related by р/с' = constant, where y is the ratio of specific heat at constant pressure to specific heat at constant volume, for compressible fluids.
Página 633 - Unlike sea water, brackish waters differ in quality, quantity, and composition not only from place to place, but also from time to time even at a given location.
Página 910 - R' P', SP, will have a constant ratio ; or the sines of the angles of incidence and refraction are in a constant ratio.
Página 218 - The resistance which is opposed to a pump rod in raising water, is ~equal to the weight of a column of water whose base is the area of the piston, and...
Página 315 - A GLACIER is AN IMPERFECT FLUID, OR A VISCOUS BODY. WHICH IS URGED DOWN SLOPES OF A CERTAIN INCLINATION BY THE MUTUAL PRESSURE OF ITS PARTS.
Página 9 - The principle of inertia is an abstract principle which must be considered as applicable to a single isolated particle. It may be enounced in the following terms: — An isolated 'material point cannot change its state, whether of rest or motion. That is to say, if it be at rest it will remain at rest; if it be in motion it will continue to move in the same direction and with the same velocity.
Página 92 - If a vessel full of water, closed on all sides, has two openings, the one a hundred times as large as the other, and if each be supplied with a piston which fits exactly, a man pushing the small piston will exert a force which will equilibrate that of a hundred men pushing the Pig. 49.— Pascal's Principle. piston which is a hundred times as large, and will overcome that of ninety-nine.
Página 71 - It is the curve which is traced by a point in the circumference of a circle which rolls along a straight line. The...