The Panorama of Science, Or Guide to KnowledgePartridge and Oakey, 1852 |
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acid action appears ascer atmosphere attraction autumnal equinox axis axle ball body called cause centre of gravity centrifugal force chemical circles cohesion colour compression conductor considerable degree diminishes direction distance diurnal motion earth eclipse effect elastic electricity electrified equal equator experiments fall feet fixed fluid friction fulcrum galvanic glass globe greater hand heat hundred inch inclined plane instance instrument iron length less lever light machine magnetic matter mechanical power mercury meridian metals miles moon move nature needle nitric acid north pole observed orbit particles passing perpendicular philosophers piece planets polar polar circles pressure produced properties proportion pulley quantity raised render resistance revolution revolve round right line rise round the sun screw side situated south pole specific gravity stars string substances sun's rays supposed surface temperature thermometer tion tricity tube vapour velocity vessel Voltaic pile weather weight wheel wind wire
Popular passages
Page 194 - The electric fluid is attracted by points. We do not know whether this property be in lightning; but since they agree in all the particulars in which we can already compare them, it is not improbable that they agree likewise in this. Let the experiment be made.
Page 116 - ... circle in the same space of time that the axle describes a small one, therefore the power is increased in the same proportion as the circumference of the wheel is greater than that of the axle. If the velocity of the wheel...
Page 74 - Aries the Ram, Taurus the Bull, Gemini the Twins, Cancer the Crab, Leo the Lion, Virgo the Virgin, Libra the Balance, Scorpio the Scorpion, Sagittarius the Archer, Capricornus the Goat, Aquarius the Waterbearer, and Pisces the Fishes...
Page 105 - ... called in geometry a parabola. But when the ball is thrown perpendicularly upwards, it will descend perpendicularly; because the force of projection, and that of gravity, are in the same line of direction. We have noticed the centres of magnitude and of motion; but I have not yet explained to you what is meant by the centre of gravity.
Page 72 - ... of our years. His diameter is 79,000 miles. This planet is surrounded by a luminous ring, the nature of which astronomers are much at a loss to conjecture : he has seven moons. Lastly, we observe the Georgium Sidus, discovered by Sir William Herschel, and which is attended by six moons.
Page 118 - ... to contain the screw ; and the inside of the nut has a spiral groove, made to fit the spiral thread of the screw ; just like the lid of a box which screws on. The handle which projects from the nut is a lever, without which the screw is never used as a mechanical power. The nut, with a lever L attached to it, is commonly called a winch. The power of the screw, complicated as it appears, is referable to one of the most simple of the mechanical powers, the inclined plane. If a slip of paper be...
Page 2 - BLIND ALICE ; or, Do Right, if you wish to be Happy. JESSIE GRAHAM; or. Friends dear, but Truth dearer. FLORENCE ARNOTT ; or. Is she Generous ? GRACE AND CLARA; or, Be Just as well as Generous. THE COUSINS AT WOODVILLE; or, Disobedience Punished.
Page 117 - When a current of wind, a stream of water, or the expansive force of steam, performs our task, we have only to superintend and regulate their operations. The fourth mechanical power is the inclined plane. This is nothing more than a slope, or declivity, frequently used to facilitate the drawing up of weights. It is not difficult to understand that a weight may with much greater ease be drawn up a slope than it can be raised the same height perpendicularly.
Page 82 - As the earth proceeds in its orbit, the days shorten and the nights lengthen throughout the northern hemisphere, until it arrives at the winter solstice, on the 21st of December, when the north frigid zone is entirely in darkness, and the southern enjoys uninterrupted daylight. Exactly half of the equator...
Page 94 - The velocity of a body is called absolute, if we consider the motion of the body in space, without any reference to that of other bodies. When, for instance, a horse goes fifty miles in ten hours, his velocity is five miles an hour.