The technical educator, an encyclopædia, المجلدات 3-4;المجلد 46 |
عبارات ومصطلحات مألوفة
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مقاطع مشهورة
الصفحة 43 - ... rivers with sufficient to maintain and make them portable from town to town, and for the bettering of lands all the way it runs ; with many more advantageous, and yet greater effects of profit, admiration, and consequence. So that deservedly I deem this invention to crown my labours, to reward my expenses, and make my thoughts acquiesce in way of further inventions...
الصفحة 43 - ... to keep them sweet, running through several streets, and so performing the work of scavengers, as well as furnishing the inhabitants with sufficient water for their private occasions...
الصفحة 107 - ... which, in some manufactories, are all performed by distinct hands, though in others the same man will sometimes perform two or three of them.
الصفحة 76 - English itself to clean contrary and different sense, unknown to any but the correspondent, and not to be read or understood by him neither, if opened before it arrive unto him ; so that neither threats, nor hopes of reward, can make him reveal the secret, the letter having...
الصفحة 44 - Nor must this distinction be regarded as trifling or insignificant, because on it depends the whole practicability of using steam as a mechanical agent. Had its action been confined to the vessel in which it was produced, it never could have been employed for any useful purpose.
الصفحة 43 - One vessel of water rarefied by fire driveth up forty of cold water ; and a man that tends the work is but to turn two cocks, that, one vessel of water being consumed, another begins to force and refill with cold water, and so successively, the fire being tended and kept constant, which the selfsame person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.
الصفحة 43 - ... is afforded from its own operation, nor yet the twentieth part thereof. And the engine consisteth of the following particulars : "A perfect counterpoise for what quantity soever of water. " A perfect countervail for what height soever it is to be brought unto. " A primum mobile, commanding both height and quantity, regulator-wise. " A vicegerent, or countervail, supplying the place and performing the full force of man, wind, beast, or mill. " A helm, or stern, with bit and reins, wherewith any...
الصفحة 43 - ... hours it burst and made a great crack ; so that, having a way to make my vessels so that they are strengthened by the force within them, and the one to fill after...
الصفحة 131 - Babbage's engine, it is true, can perform these operations ; it can also extract the roots of numbers, and approximate to the roots of equations, and even to their impossible roots ; but this is not its object. Its function, in contradistinction to that of all other contrivances for calculating, is to embody in machinery the method of differences, which has never before been done ; and the effects which it is capable of producing, and the works which, in the course of a few years, we expect to see...
الصفحة 200 - ... their admiration of the zeal and perseverance with which he has deduced the mean pressure and temperature of the atmosphere, and the quantity of rain for each month and for the whole year ; with the prevailing direction and force of the wind at different seasons in this neighbourhood, from a series of more than 200,000 observations, from the end of the year 1793 to the beginning of 1844, being a period of half a century.