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 38
... horizon as foon as the hand lets it go . It was always known that bodies left to them- felves defcended towards the earth , and preffed the hand which prevented them from falling ; but as there were fome bodics whofe weight was fcarce ...
... horizon as foon as the hand lets it go . It was always known that bodies left to them- felves defcended towards the earth , and preffed the hand which prevented them from falling ; but as there were fome bodics whofe weight was fcarce ...
Página 128
... horizon HO . Then OC is the direction of the force of the wind that acts against the kite ; and the force by which it is kept up , is as the fquare of the fine of the angle A C W , or COD . Now if DO reprefent the given weight of the ...
... horizon HO . Then OC is the direction of the force of the wind that acts against the kite ; and the force by which it is kept up , is as the fquare of the fine of the angle A C W , or COD . Now if DO reprefent the given weight of the ...
Página 129
... , continue to move horizontally for fome time , without ftriking the air , because he has acquired a fufficient velocity and his wings being VOL . III . K parallel parallel to the horizon , meet with but a fmall ON MECHANICE . 129.
... , continue to move horizontally for fome time , without ftriking the air , because he has acquired a fufficient velocity and his wings being VOL . III . K parallel parallel to the horizon , meet with but a fmall ON MECHANICE . 129.
Página 130
... horizon , meet with but a fmall m fiftance ; and when he begins to fall , he can easily fteer himself upwards by his tail , till the motion he had acquired is nearly fpent , when he must renew it by two or three more ftrokes with his ...
... horizon , meet with but a fmall m fiftance ; and when he begins to fall , he can easily fteer himself upwards by his tail , till the motion he had acquired is nearly fpent , when he must renew it by two or three more ftrokes with his ...
Página 155
... horizon , the direction of the line of defcent is not changed : when the body is on a plane parallel to the ho- rizon , it finds an invincible obftacle to it's de- scent : when the plane is perpendicular to the horizon , it will fall ...
... horizon , the direction of the line of defcent is not changed : when the body is on a plane parallel to the ho- rizon , it finds an invincible obftacle to it's de- scent : when the plane is perpendicular to the horizon , it will fall ...
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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
Pasajes populares
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...