Conversations on Natural Philosophy: In which the Elements of that Science are Familiarly Explained, and Adapted to the Comprehension of Young PupilsLincoln & Edmands, 1826 - 252 من الصفحات |
من داخل الكتاب
النتائج 1-5 من 21
الصفحة 8
... Mirrors ; Reflection of Con- vex Mirrors ; Reflection of Concave Mirrors . CONVERSATION XVI . On Refraction and Colours . Page 197 . Transmission of Light by Transparent Bodies ; Refraction ; Re- fraction of the Atmosphere ; Refraction ...
... Mirrors ; Reflection of Con- vex Mirrors ; Reflection of Concave Mirrors . CONVERSATION XVI . On Refraction and Colours . Page 197 . Transmission of Light by Transparent Bodies ; Refraction ; Re- fraction of the Atmosphere ; Refraction ...
الصفحة 24
... mirrors , stuck so fast together , that I imagined some of the gum I had been using had by chance been interposed between them ; but now I make no doubt but that it was their own natu- ral cohesive attraction which produced this effect ...
... mirrors , stuck so fast together , that I imagined some of the gum I had been using had by chance been interposed between them ; but now I make no doubt but that it was their own natu- ral cohesive attraction which produced this effect ...
الصفحة 188
... mirror , so that the ray shall fall perpendicularly upon it . 778. How may more shadows than one be produced by a single opaque body ? - -779 . By which figure is this illustrated ? - 780. What is meant by the reflection of light ...
... mirror , so that the ray shall fall perpendicularly upon it . 778. How may more shadows than one be produced by a single opaque body ? - -779 . By which figure is this illustrated ? - 780. What is meant by the reflection of light ...
الصفحة 189
... mirror , and of the reflected ray returning from the mirror . Mrs. B. Exactly so . We shall now separate them by holding the mirror M , ( fig . 6. ) in such a manner , that the incident ray A B shall fall obliquely upon it — you see the ...
... mirror , and of the reflected ray returning from the mirror . Mrs. B. Exactly so . We shall now separate them by holding the mirror M , ( fig . 6. ) in such a manner , that the incident ray A B shall fall obliquely upon it — you see the ...
الصفحة 195
... mirror than any made by art . Emily . But is it possible , that the extensive landscape which I now behold from the window , should be repre- sented on so small a space as the retina of the eye ? Mrs. B. It would be impossible for art ...
... mirror than any made by art . Emily . But is it possible , that the extensive landscape which I now behold from the window , should be repre- sented on so small a space as the retina of the eye ? Mrs. B. It would be impossible for art ...
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
angle angle of incidence appear astronomy atmosphere axis ball called camera obscura Caroline centre of gravity centrifugal force circle cohesive attraction concave mirror consequently convex mirror degrees diminished direction distance diurnal motion earth eclipse ecliptick effect Emily equal equator explain figure fixed stars focus force fulcrum geometry glass globe greater heat humour lens less lever liquids mechanical power mechanicks mercury meridian moon motion move Natural Philosophy nature object obliquely observe opaque body opposite opticks orbit particles passes pendulum perpendicular planets plate poles pressure produced properties proportion pulley pump rays fall rays of light re-action reflected rays reflecting telescope refraction represents resistance retina right line rise round the sun shadow shines situated solar solid bodies sonorous body sound space specifick gravity sphere spring sun's rays suppose surface tides tion tube understand vapour velocity vibrations weight whilst wind zodiack
مقاطع مشهورة
الصفحة 89 - 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 2 - District Clerk's Office. BE IT REMEMBERED, that on the tenth day of August, AD 1829, in the fifty-fourth year of the Independence of the United States of America, JP Dabney, of the said district, has deposited in this office the title of a book, the right whereof he claims as author, in the words following, to wit...
الصفحة 101 - 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 89 - 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...
الصفحة 89 - 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 137 - The lateral pressure is the result therefore of the pressure downwards, or the weight of the liquid above ; and consequently the lower the orifice is made in the vessel, the greater will be the velocity of the water rushing out of it.
الصفحة 70 - You will see by this figure (fig. 9.) that it is composed of two parts, the screw and the nut. The screw S is a cylinder, with a spiral protuberance coiled round it, called the thread: the nut N is perforated to contain the screw; and the inside of the nut has a spiral groove, made to fit the spiral thread of the screw.
الصفحة 87 - ... show that heat is produced by the sun's rays only when they act on a calorific medium: they are the cause of the production of heat, by uniting with the matter of fire which is contained in the substances that are heated...
الصفحة 140 - A piece of lead, let us say a cubic inch, for instance, would have less specific gravity in summer than in winter; for it would be more dense in the latter season. CAROLINE. • But, Mrs. B., if you compare the weight of equal quantities of different bodies, they will all be alike. You know the old saying, that a pound of feathers is as heavy as a pound of lead ! MRS.
الصفحة 215 - ... 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.