Scientific Dialogues for the Instruction and Entertainment of Young People: In which the First Principles of Natural Experimental Philosophy are Fully Explained and Illustrated
Bell and Daldy, 1866 - 583 strán (strany)
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Scientific Dialogues: Intended for the Instruction and ..., Zväzok 1
Úplné zobrazenie - 1825
angle appear applied atmosphere attraction axis ball body bottom called cause centre circle common consequently continually CONVERSATION depend described diameter direction distance divided earth eclipse effect electric equal equator experiment explain fall feet figure fixed fluid force give glass gold grains greater half hand heat heavens inches increase kind lead length less lever light magnet matter means mechanical mercury metal miles minute moon motion move nature object observe orbit Papa particles pass piece planets poles position pounds present pressure principle produced proportion quantity QUESTIONS FOR EXAMINATION raised rays reason receiver reflected represent rise round seen side silver space specific gravity square stand stars substances Suppose surface taken tube turn vessel weight whole wire
Strana 176 - Venus a pea, on a circle of 284 feet in diameter ; the Earth also a pea, on a circle of 430 feet ; Mars a rather large pin's head, on a circle of 654 feet ; the Asteroids, grains of sand, in orbits of from 1000 to 1200 feet; Jupiter a moderate-sized orange, in a circle nearly half a mile across...
Strana 98 - To ask or search, I blame thee not; for heaven Is as the book of God before thee set, Wherein to read his wondrous works...
Strana 176 - Pallas, grains of sand, in orbits of from 1000 to 1200 feet; Jupiter a moderate-sized orange, in a circle nearly half a mile across; Saturn a small orange, on a circle of four-fifths of a mile; Uranus a full-sized cherry, or small plum, upon the circumference of a circle more than a mile and a half, and Neptune a good-sized plum on a circle about two miles and a half in diameter.
Strana 362 - When foul weather happens soon after the falling of the mercury expect but little of it ; and on the contrary, expect but little fair weather when it proves fair shortly after the mercury has risen.
Strana 278 - The horizontal distance to which a fluid will spout from a horizontal pipe in any part of the side of an upright vessel, below the surface of the fluid, is equal to twice the length of a perpendicular to the side of the vessel, drawn from the mouth of the pipe to a semicircle described upon the altitude of the fluid : and therefore the...
Strana 384 - This will lead us to the explanation of one of the principal definitions in optics, viz. that the angle of reflection is always equal to the angle of incidence.
Strana 246 - He first established the truth, that a body plunged in a fluid loses as much of its weight as is equal to the weight of an equal volume of the fluid!
Strana 353 - The mercury is sustained in the tube by the pressure of the atmosphere on the surface of the fluid in the cup.