Conversations on natural philosophy, by the author of Conversations on chemistry1839 |
Common terms and phrases
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 double stars draw earth eclipse effect elastic EMILY equal equator fixed stars fluid focus fulcrum glass globe greater heat heavier lens less lever lighter liquid luminous body mechanical power meridian moon motion move nature nearer object obliquely observe opaque body orbit particles pass perfectly perpendicular planets Plate pole pressure prism proceed produced proportion Published by Longman pulley pump rays fall rays of light re-action reflected rays refracting telescope refraction resistance retina revolve round rise round the sun shadow shine situated solid bodies sonorous body space specific gravity string sun's rays suppose surface true tube understand vapour velocity vibrations weight whilst wind
Popular passages
Page 175 - The starry host rode brightest, till the moon, Rising in clouded majesty, at length Apparent queen unveil'd her peerless light, And o'er the dark her silver mantle threw.
Page 199 - ... the inclination of the earth's axis to the plane of its orbit.
Page 174 - 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 Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung...
Page 174 - 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...
Page 455 - 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...
Page 261 - ... but merely by its depth ; for as every particle acts independently of the rest, it is only the column of particles immediately above the orifice that can weigh upon and press out the water EMILY, The breadth and width of the vessel, then, can be of no consequence in this respect.
Page 389 - Emily ;i and since we see objects in the direction of the reflected ray; we shall see the image at L, which is the point at which the reflected rays, if continued through the mirror, would unite and form an image.
Page 447 - ... which is by far the most important part of the eye, as it is that which receives the impression of the objects of sight, and conveys it to the mind. The retina consists of an expansion of the optic nerve...
Page 134 - ... 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 257 - This level, or equilibrium of fluids, is the natural result of their particles gravitating independently of each other ; for when any particle of a fluid accidentally finds itself elevated above the rest, it is attracted down to the level of the surface of the fluid, and the readiness with which fluids yield to the slightest impression, will enable the particle by its weight to penetrate the surface of the fluid and mix with it.