Conversations on natural philosophy, by the author of Conversations on chemistry


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Página 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.
Página 199 - ... the inclination of the earth's axis to the plane of its orbit.
Página 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...
Página 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...
Página 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...
Página 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.
Página 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.
Página 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...
Página 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...
Página 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.

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