Familiar Illustrations of Natural Philosophy: Selected Principally from Daniell's Chymical PhilosophyHarper & Brothers, 1840 - 403 sider |
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Side 174
... lenses refract both the light and heat of the sun , and hence are familiarly dis- tinguished as burning - glasses ; but when held before any source of terrestrial heat , the most delicate air- thermometer will scarcely be affected . The ...
... lenses refract both the light and heat of the sun , and hence are familiarly dis- tinguished as burning - glasses ; but when held before any source of terrestrial heat , the most delicate air- thermometer will scarcely be affected . The ...
Side 175
... lens be held before it , the ra- diant heat which will pass through it will scarcely affect the most delicate air - thermometer . If a piece of solid matter capable of resisting its action , such as a wire of platinum , be held in it ...
... lens be held before it , the ra- diant heat which will pass through it will scarcely affect the most delicate air - thermometer . If a piece of solid matter capable of resisting its action , such as a wire of platinum , be held in it ...
Side 320
... lenses . Prisms used for optical purposes are triangular , and affect light in the following manner . By a proper adjustment of surfaces , the original deviation 320 LENSES AND PRISMS .
... lenses . Prisms used for optical purposes are triangular , and affect light in the following manner . By a proper adjustment of surfaces , the original deviation 320 LENSES AND PRISMS .
Side 321
... lenses there are six different forms , each enclosed by two symmetric surfaces , of which one at least is curved ... lens is bounded by two spherical sur- faces , both of which are convex . Fig 2 . 376. The most extraordinary fact ...
... lenses there are six different forms , each enclosed by two symmetric surfaces , of which one at least is curved ... lens is bounded by two spherical sur- faces , both of which are convex . Fig 2 . 376. The most extraordinary fact ...
Side 322
... lens is bounded by a plane and a con- cave spherical surface . Fig . 3 . 4. The double concave lens is bounded by two spherical sur- faces , both of which are concave . Fig . 4 . 5. The meniscus , bounded by a concave and a convex sur ...
... lens is bounded by a plane and a con- cave spherical surface . Fig . 3 . 4. The double concave lens is bounded by two spherical sur- faces , both of which are concave . Fig . 4 . 5. The meniscus , bounded by a concave and a convex sur ...
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Vanlige uttrykk og setninger
acid action aeriform angle atmosphere attraction axis battery become bodies boiling called capable centre charge chymical circuit cohesion colours communication conducting wire conductor convex convex lens cool copper crown glass crystal cylinder degree direction discharge distance earth effect elasticity electricity electrolysis electrometer equal experiment extremity figure flint glass fluid force friction galvanometer glass tube heat ICAL inches increased induction influence instrument insulated intensity iron latent heat lens Leyden jar liquid magnet mass matter measure mercury metal mirror motion nature needle object observed opposite parallel particles pass phenomena piece plane plate platinum polar poles portion position pressure produced proportion quantity quicksilver rays of light rection reflected refraction repulsion resinous scale side solid sound spark specific gravity steam substance surface suspended takes place temperature thermometer tion tourmaline tricity vapour velocity vessel vibrations voltaic weight zinc
Populære avsnitt
Side 20 - Matter in solid, massy, hard, impenetrable, moveable Particles, of such Sizes and Figures, and with such other Properties, and in such Proportion to Space, as most conduced to the End for which he form'd them...
Side 20 - ... it seems probable to me that God in the beginning formed matter in solid, massy, hard, impenetrable, moveable particles, of such sizes and figures, and with such other properties and in such proportion to space as most conduced to the end for which he formed them; and that these primitive particles being solids are incomparably harder than any porous bodies compounded of them, even so very hard as never to wear or break in pieces, no ordinary power being able to divide what God himself made one...
Side 133 - ... passing from the solid to the liquid, and from the liquid to the gaseous form, or the contrary, occasioning endless vicissitudes of temperature over the globe.
Side 303 - The extraordinary noise caused by the horses' hoofs makes the fish issue from the mud, and excites them to combat. These yellowish and livid eels, resembling large aquatic serpents, swim on the surface of the water, and crowd under the bellies of the horses and mules. A contest between animals of so different an organisation furnishes a very striking spectacle.
Side 386 - A cylinder is a solid figure described by the revolution of a rightangled parallelogram about one of its sides which remains fixed. XXII. The axis of a cylinder is the fixed straight line about which the parallelogram revolves. XXIII. The bases of a cylinder are the circles described by the two revolving opposite sides of the parallelogram.
Side 303 - Iiraians, provided with harpoons and long slender reeds, surround the pool closely ; and some climb upon the trees, the branches of which extend horizontally over the surface of the water. By their wild cries and the length of their reeds, they prevent the horses from running away and reaching the bank of the pool. The eels, stunned by the noise, defend themselves by the repeated discharge of their electric batteries.
Side 54 - From the foregoing statements it may be safely inferred that " the mean height of the barometer at the level of the sea being the same in every part of the globe...
Side 304 - During a long time they seem to prove victorious. Several horses sink beneath the violence of the invisible strokes, which they receive from all sides in organs the most essential to life ; and, stunned by the force and frequency of the shocks, disappear under the water. Others panting, with mane erect, and haggard eyes, expressing anguish, raise themselves, and endeavour to flee from the storm by which they are overtaken.
Side 265 - The needle is also subject to diurnal variations ; in our latitudes it moves slowly eastward during the forenoon, and returns to its mean position about ten in the evening ; it then deviates to the westward, and again returns to its mean position about ten in the morning.
Side 303 - A live fish about five inches in length, caught not half a minute before, was dropped into the tub. The Gymnotus instantly turned round in such a manner as to form a coil inclosing the fish, the latter representing a diameter across it; a shock passed, and there in an instant was the fish struck motionless, as if by lightning, in the midst of the waters, its side floating to the light.