Natural Philosophy for Schools |
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Términos y frases comunes
acts angle apparatus apparent magnitude applied atmosphere atmospheric pressure axis axle ball balloon barometer body bulk for bulk called centre of gravity centrifugal force cistern cock colour column compressed concave conductor convex lens cornea crank cubic foot cylinder diameter diminished direction discharge distance electricity equal example experiments explained external fall feet fluid force friction glass greater heat hydrogen imparted inches of mercury instrument length less lever leverage lighter liquid luminous machine magnitude mercury metal monochord motion moving power nonconductor object passing pipe piston placed plane position pressed pressure principle produced proportion quantity raised reflecting telescope reflection refraction rendered represented in fig reservoir resistance retina rise round screw shaft shown in fig solid sound space specific gravity square inch string substance surface syringe temperature transmitted tube valve velocity velocity of sound vessel vibrations weight wheel
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Página 135 - Transactions," mistook pink for pale blue, and a full red for a full green. All kinds of yellows and blues, except sky-blue, he could discern with great nicety. His father, his maternal uncle, one of his sisters, and her two sons, had all the same defect. A tailor at Plymouth...
Página 60 - The wheels of carriages may be regarded as rollers which are continually carried forward with the load. In addition to the friction of the rolling motion on the road, they have, it is true, the friction of the axle in the nave ; but, on the other hand, they are free from the friction of the rollers with the under surface of the load, or the carriage in which the load is transported. The advantage of wheel carriages in diminishing the effects of friction, is sometimes attributed to the slowness with...