The Elements of Natural Philosophy: Copiously Illustrated by Familiar Experiments and Containing Descriptions of Instruments, with Directions for Using : Designed for the Use of Schools and AcademiesPhillips, Sampson, 1856 - 368 pàgines |
Frases i termes més freqüents
acid air-pump angle aqueous humor armature arrangement atmosphere attached attracted ball battery become body bulb cause centre charged colors concave concave mirror condensed connect converged convex convex lens copper crystalline lens cylinder direction discharge distance Drummond Light earth effects elastic electric current electric fluid electro-magnet Electrometer exhaust fall feet flow focus force gases Give the experiment glass tube heat hydrogen illustrated inches instrument insulated inverted iron lantern lens lenses lever Leyden Jar liquid machine Magic Lantern magnet magnifying mercury metallic microscope mirror motion needle object oxygen passing piston placed plate poles portion position pressure prime conductor produced pump-plate quantity reflected reflecting telescope refracting rendered retina revolve screen screw screw-cups seen in Fig shown in Fig side solar sound specific gravity steam stop-cock sulphuric acid surface Telegraph telescope thermometer tricity Trough Battery vacuum valve vapor vibrations weight wire zinc
Passatges populars
Pàgina 32 - These simple machines are the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw.
Pàgina 141 - A notorious instance of a sound-collecting surface was the ear of Dionysius, in the dungeons of Syracuse : the roof of the prison was so formed as to collect the words and even whispers of the unhappy prisoners, and to direct them along a hidden conduit to where the tyrant sat listening. The wide-spread sail of a ship, rendered concave by a gentle breeze, is also a good collector of sound. It happened...
Pàgina 219 - Daniel's battery, and consists of a plain glass tumbler, in which is placed a cylinder of amalgamated zinc, with an opening on one side to allow a free circulation of the liquid. Within this cylinder is placed a porous cup, or cell of earthenware, in which is suspended a strip of platinum fastened to the end of a zinc arm projecting from the adjoining zinc cylinder. The porous cup containing the platinum is filled with...
Pàgina 316 - Herschel attributes this state of vision to a defect in the sensorium, by which it is rendered incapable of appreciating exactly those differences between rays on which their colour depends.
Pàgina 39 - From its portable form, cheapness of construction, and the facility with which it may be applied in almost every situation, the pulley is one of the most useful of the simple machines. The mechanical advantage, however, which it appears...
Pàgina 237 - Liebig has suggested a theory of muscular action, which supposes that the contractile force of the muscles is due to a principle set free by the oxidizement of the animal tissues by the blood, in the same way that electricity is set free by the oxidizement of zinc.
Pàgina 89 - Impenetrability, — which signifies that no two bodies can occupy the same space at the same time.
Pàgina 293 - When the ray of light passes from a rarer into a denser medium, it is bent or refracted towards the perpendicular Pig.
Pàgina 64 - ... platinum wire ; weigh it in air, then in water, and finally in the liquid ; the differences between the first weight and each of the latter, will give the weights of equal volumes of water and the liquid. Divide the weight of the liquid by that of the water, and the quotient will be the specific gravity of the liquid, prorule ; vided the temperature of water be at the standard.
Pàgina 104 - To explain the construction of the common barometer, and to shew that the mercury is sustained in it by the pressure of the air on the surface of the mercury in the basin.