Lectures on Natural and Experimental Philosophy: Considered in It's [sic] Present State of Improvement : Describing, in a Familiar and Easy Manner, the Principal Phenomena of Nature, and Shewing, that They All Co-operate in Displaying the Goodness, Wisdom, and Power of God, Volumen3R. Hindmarsh ... ; Sold by the author, 1794 |
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Página iv
... LECTURE XXXI . Of the mechanical powers 257 Of the lever 262 " Of the ballance 277 Of the steelyard and Helfham's property of the bal- lance 284 Of the wheel and axis 285 Of Page Of the pulley Of the inclined plane Of the iv CONTENTS .
... LECTURE XXXI . Of the mechanical powers 257 Of the lever 262 " Of the ballance 277 Of the steelyard and Helfham's property of the bal- lance 284 Of the wheel and axis 285 Of Page Of the pulley Of the inclined plane Of the iv CONTENTS .
Página 36
... ballance to itself , nothing remains but the preffure of the air , which fupports a co- lumn equal in weight to itself . But when that medium is excluded at top by the perfect contact between the mercury and the glafs , and cannot pafs ...
... ballance to itself , nothing remains but the preffure of the air , which fupports a co- lumn equal in weight to itself . But when that medium is excluded at top by the perfect contact between the mercury and the glafs , and cannot pafs ...
Página 93
... ballance each other , and are made to produce order by their proper commixture , out of that which feparately would tend to confufion . Hɛ knows how and when to raife up peculiar charac- ters that may found or overthrow empires , and ...
... ballance each other , and are made to produce order by their proper commixture , out of that which feparately would tend to confufion . Hɛ knows how and when to raife up peculiar charac- ters that may found or overthrow empires , and ...
Página 109
... effect of mechanical engines depends in a great degree upon this principle ; for if a fmall weight is to ballance a great one , we must con- only as unreafonable , but as unneceffary ; there being trive ON MECHANICS . 109.
... effect of mechanical engines depends in a great degree upon this principle ; for if a fmall weight is to ballance a great one , we must con- only as unreafonable , but as unneceffary ; there being trive ON MECHANICS . 109.
Página 126
... ballance and destroy each other , and the particle is faid to be in equilibrio ; when two forces ballance each other , they are confidered as equal and oppofite . Any number of forces acting on a particle of matter , will be ballanced ...
... ballance and destroy each other , and the particle is faid to be in equilibrio ; when two forces ballance each other , they are confidered as equal and oppofite . Any number of forces acting on a particle of matter , will be ballanced ...
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Términos y frases comunes
abfolute afcend againſt alfo aqua fortis arifes atmoſphere axis ballance beam becauſe body cafe caufe cauſe center of gravity circle confequently confiderable confidered conftellation defcend defcribed diameter diftance diurnal motion earth ecliptic elaftic equal equator faid fame fcrew fecond feet fenfes feven fhall fhew fhould fide firft fituation fixed fluid fmall folid fome fouth fpace fpecific gravity fphere fquare friction ftar ftrength ftring ftroke fubftance fubject fuch fufficient fufpended fuftain fuppofe fupport furface fyftem glafs heavens horizon inches inclined plane increaſe inftance interfection itſelf lefs lever lofes machine mafs meaſure moſt motion muft muſt neceffary obferved ofcillation oppofite ounces paffing pendulum pifton plane pofition pole preffed preffure proportion pullies purpoſe quantity of matter raife raiſed reafon refiftance reft rife ſmall ſpace thefe theſe thofe thoſe tion tube uſed veffel velocity vibrations weft weight wheel whofe
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Página 483 - In them hath he set a tabernacle for the sun; which is as a bridegroom coming out of his chamber, and rejoiceth as a strong man to run a race. His going forth is from the end of the heaven, and his circuit unto the ends of it: and there is nothing hid from the heat thereof.
Página 431 - In a year the wings were finished, and on a morning appointed, the maker appeared furnished for flight on a little promontory : he waved his pinions awhile to gather air, then leaped from his stand, and in an instant dropped into the lake.
Página 431 - I should with great alacrity teach them all to fly. But what would be the security of the good, if the bad could at pleasure invade them from the sky ? Against an army sailing through the clouds neither walls, nor mountains, nor seas, could afford any security. A flight of northern savages might hover in the wind, and light at once with irresistible violence upon the capital...
Página 341 - But in the way in which this business is now carried on, not only the whole work is a peculiar trade, but it is divided into a number of branches, of which the greater part are likewise peculiar trades.
Página 341 - One man draws out the wire, another straights it, a third cuts it, a fourth points it, a fifth grinds it at the top for receiving the head ; to make the head requires two or three distinct operations ; to put it on is a peculiar business, to whiten the pins is another ; it is even a trade by itself to put them into the paper; and the important business of making a pin is in this manner divided into about eighteen distinct operations...
Página 431 - But what would be the security of the good if the bad could at pleasure invade them from the sky? Against an army sailing through the clouds, neither walls nor mountains nor seas could afford any security. A flight of northern savages might hover in the wind and light at once with irresistible violence upon the capital of a fruitful region that was rolling under them.
Página 483 - Let them praise the name of the LORD: for he commanded, and they were created.
Página 341 - ... the important business of making a pin is, in this manner, divided into about eighteen distinct operations, which, in some manufactories, are all performed by distinct hands, though in others the same man will sometimes perform two or three of them.
Página 430 - To survey with equal security the marts of trade and the fields of battle, mountains infested by barbarians and fruitful regions, gladdened by plenty and lulled by peace! How...
Página 416 - ... passed through it like water through a sieve. His experiments, therefore, made in the year 1782, proceeded no farther than blowing up soap-bubbles with inflammable air, which ascended rapidly to the ceiling, and broke against it. But, while the discovery of the art of aerostation seemed thus on the point of being made in Britain, it was all at once announced in France, and that from a quarter whence nothing of the kind was to have been expected. Two brothers, Stephen and John Montgolfier, natives...