Conversations on Natural Philosophy: in which the Elements of that Science are Familiarly Explained, and Adapted to the Comprehension of Young PupilsGould, Kendall & Lincoln, 1836 - 276 من الصفحات |
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angle angle of incidence appear atmosphere attraction of cohesion axis ball called camera obscura CAROLINE centre of gravity centrifugal force circle coloured rays concave mirror consequently convex dark degrees diminished direction distance diurnal motion earth eclipse effect elastic EMILY equal equator fixed stars fluid focus force fulcrum glass globe greater heat LENOX AND TILDEN lens less lever liquid matter mechanical power meridian moon motion move nature object obliquely observe opaque body opposite orbit particles pass perfectly perpendicular planets Plate pole pressure prism proceed produced proportion PUBLIC LIBRARY ASTOR Published by Longman pulley pump quantity rays of light recollect reflected rays refracting telescope refraction resistance retina revolve round rise round the sun shadow shine situated solid bodies space specific gravity string sun's rays suppose surface true tube understand vapour velocity vibrations weight whilst wind YORK PUBLIC LIBRARY
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الصفحة 172 - Had in her sober livery all things clad; Silence accompanied, for beast and bird, They to their grassy couch, these to their nests, Were slunk, all but the wakeful nightingale; She all night long her amorous descant* sung; Silence was pleased: now...
الصفحة 196 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
الصفحة 132 - ... 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...
الصفحة 172 - By shorter flight to the east, had left him there Arraying with reflected purple arid gold The clouds that on his western throne attend. -^Now came still evening. on, and twilight gray Had in her sober livery all things clad ; Silence accompanied; for beast and bird, They to their grassy couch, these to their nests I Were slunk, all but the wakeful nightingale...
الصفحة 446 - The single microscope (fig. 4.), consists simply of a convex lens, commonly called a magnifying glass; in the focus of which the object is placed, and through which it is viewed : by this means, you are enabled to...
الصفحة 67 - B it receives in return a blow equal to that which it gave, but in a contrary direction, and its motion is thereby stopped, or rather, given to B. Therefore, when a body strikes against another, the quantity of motion communicated to the second body...
الصفحة 405 - ... the white rays of the sun are composed of coloured rays, which when blended together, appear colourless or white. Sir Isaac Newton, to whom we are indebted for the most important discoveries respecting light and colours, was the first who divided a white ray of light, and found it to consist of an assemblage of coloured rays, which formed an image upon the wall, such as is exhibited, in which are displayed the following series of colours — red, orange, yellow, green, blue, indigo, and violet.
الصفحة 310 - ... the piston ought not to exceed thirty-two feet, otherwise the water would not be sure to rise through that valve, for the weight of the air is sometimes not sufficient to raise a column of mercury more than twentyeight inches, or a column of water much more than thirty-two feet ; but when once it has passed that opening, it is no longer the pressure of air on the reservoir which makes it ascend — it is raised by lifting it up, as you would raise it in a bucket, of which the piston formed the...
الصفحة 208 - In moving round the sun, the axis of the earth is not perpendicular to the plane of its orbit ; in other words, its axis does not move round the sun in an upright position, but slanting or oblique.
الصفحة 53 - Thus, a man sailing in a ship may remain at rest relatively to the vessel, though he partakes of its absolute motion ; but if he walk the deck in the same direction as that in which the ship is sailing, his absolute motion will be increased by the rate at which he moves along it.