An Easy Grammar of Natural and Experimental Philosophy: For the Use of SchoolsKimber & Conrad; W. Brown, printer, 1811 - 152 |
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Strona 73
... coats , covering one ano- ther , and inclosing different substances , called humours . 247. The three coats are the sclerotica , the choroides , and the retina . 248. The three humours are the aqueous , the crystalline , and the ...
... coats , covering one ano- ther , and inclosing different substances , called humours . 247. The three coats are the sclerotica , the choroides , and the retina . 248. The three humours are the aqueous , the crystalline , and the ...
Strona 98
... or with a piece of flannel , or on your coat sleeve , and it will have the power of attracting small bits of paper or other very light substances when held near them . E BB Battery 57 . 60 Galvanism Magnetism 63 58 98 ELECTRICITY .
... or with a piece of flannel , or on your coat sleeve , and it will have the power of attracting small bits of paper or other very light substances when held near them . E BB Battery 57 . 60 Galvanism Magnetism 63 58 98 ELECTRICITY .
Strona 107
... coat- ed and charged with electricity , a discharge takes place . 412. Glass of any form , provided it be sound , will answer the purpose , but cylin- drical jars are chiefly used . 413. A glass bottle or jar properly coated for ...
... coat- ed and charged with electricity , a discharge takes place . 412. Glass of any form , provided it be sound , will answer the purpose , but cylin- drical jars are chiefly used . 413. A glass bottle or jar properly coated for ...
Strona 138
... coats ? What are the three humours ? Explain this by fig . 47 . How are objects seen ? Will you illustrate this ? Are the images of objects painted on the eye erect ? Upon what does dimness of sight depend ? For what are spectacles used ...
... coats ? What are the three humours ? Explain this by fig . 47 . How are objects seen ? Will you illustrate this ? Are the images of objects painted on the eye erect ? Upon what does dimness of sight depend ? For what are spectacles used ...
Strona 151
... coats of the eye . Cohesion , the force inherent in all substances which pre- vents them from falling to pieces ... coat of the eye , containing the watery humour . Corpuscula , the smallest of all bodies . Cubic inch , is an inch square ...
... coats of the eye . Cohesion , the force inherent in all substances which pre- vents them from falling to pieces ... coat of the eye , containing the watery humour . Corpuscula , the smallest of all bodies . Cubic inch , is an inch square ...
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advantage gained angle angle of incidence appear atmosphere attraction battery body brass called camera obscura candle centre of gravity circle coats colours communication converge convex lens cylinder diameter diurnal motion earth eclipse elastic electric fluid electrified equal Example Experiment Explain eye-glass fall fixed focal distance focus force fulcrum galvanic glass tube Herschel horizon hydrostatical Illustration inches inclined plane kind of lever length line of direction machine magnetic needle means meant mechanical powers mercury meridian metal mirror moon motion move north pole object orbits parallel rays particles pass pendulum perpendicular phial piece pipe piston placed planets plate poles pounds pressure prime conductor proportion pulley quantity quicksilver rays of light reflected refracting telescope refraction repel retina round screw side space specific gravities stars substances surface telescope tion velocity Venus vessel Vesta vibrations weight
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Strona 2 - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape. An Historical Tale." In conformity to the Act of the Congress of the United States...
Strona 65 - ... and, consequently, the heat at the focus is to the common heat of the sun, as the area of the glass is to the area of the focus. Thus, if a lens, four inches in diameter, collect the sun's rays into a focus, at the distance of twelve inches, the image will not be more than...
Strona 28 - ... them. Here the power must exceed the weight in the same proportion as the distance of the weight from the prop exceeds the distance of the power.
Strona 70 - And if he hold out his hand towards the mirror, the hand of the image will come out towards his hand, and coincide with it, of an equal bulk, when his hand is in the centre of concavity; and he will imagine he may shake hands with his image.
Strona 63 - If the medium which the rays enter be denser, they move through it in a direction nearer to the perpendicular drawn to its surface. On the contrary, when light passes out of a denser into a rarer medium, it moves in a direction farther from the perpendicular. This refraction is greater or less — that is, the rays are more or less bent, or turned aside from their course — as the second medium through which they pass is more or less dense than the first. To prove this in a satisfactory...
Strona 19 - UB, be drawn parallel to them, so as to complete the parallelogram, then the line which the body A will describe will be in the diagonal AD, and the length of this line will represent the force with which the body will move.
Strona 54 - That upon very great winds, though they be not accompanied with rain, the mercury sinks lowest of all, with relation to the point of the compass the wind blows upon.
Strona 81 - C to all parts of the glass, and each plane surface will refract these rays to the eye, the same object will appear to the eye, in the direction of the rays which enter it through each surface. Thus, a ray...
Strona 43 - The pressure of a fluid upon any given part of the bottom or sides of a vessel is equal to the weight of a column of that fluid, having a base equal to that part of the bottom or side, and an altitude equal to the perpendicular height of the fluid above it.
Strona 23 - If a line be drawn from the centre of gravity of a body perpendicular to the horizon, it is called the line of direction, because it is the line that the centre of gravity would describe if the body fell freely.