The Elements of Natural Or Experimental Philosophy, Τόμος 3T. Cadell and W. Davies, 1803 |
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Σελίδα 22
... light of the fun may not fall directly upon them . Fig . 2. Plate XVIII . represents a thermometer of the most usual fhape independent of the cafe . For chemical purposes , the bulbs and part of the tubes of the thermometers , muft ...
... light of the fun may not fall directly upon them . Fig . 2. Plate XVIII . represents a thermometer of the most usual fhape independent of the cafe . For chemical purposes , the bulbs and part of the tubes of the thermometers , muft ...
Σελίδα 95
... light it reflects on the earth , might be expected to com- municate fome degree of heat ; but though that light , concentrated by a large concave mirror , has been thrown upon the most fenfible thermometers , yet I am not certain that ...
... light it reflects on the earth , might be expected to com- municate fome degree of heat ; but though that light , concentrated by a large concave mirror , has been thrown upon the most fenfible thermometers , yet I am not certain that ...
Σελίδα 104
... light ; for if they were the fame thing , then a certain quantity of heat ought to be constantly accompanied with the fame quantity of light ; whereas we find that feveral fubftances give out a good deal of light without any fenfible ...
... light ; for if they were the fame thing , then a certain quantity of heat ought to be constantly accompanied with the fame quantity of light ; whereas we find that feveral fubftances give out a good deal of light without any fenfible ...
Σελίδα 105
... light do also proceed in ftraight lines from the luminous body in every direction , as long as they do not meet with ... light , are the fame as those which are produced by the fame body upon the rays of heat ; for inftance , a plate of ...
... light do also proceed in ftraight lines from the luminous body in every direction , as long as they do not meet with ... light , are the fame as those which are produced by the fame body upon the rays of heat ; for inftance , a plate of ...
Σελίδα 110
Tiberius Cavallo. The rays of light are likewife refracted in going through diaphanous bodies . But it has been clearly proved by Dr. Herschel , that the rays of heat are refracted differently from the rays of light ; so that though they ...
Tiberius Cavallo. The rays of light are likewife refracted in going through diaphanous bodies . But it has been clearly proved by Dr. Herschel , that the rays of heat are refracted differently from the rays of light ; so that though they ...
Συχνά εμφανιζόμενοι όροι και φράσεις
alfo alſo angle angle of incidence appear atmoſphere attraction battery becauſe body cafe caloric colours concave conductor confiderable confifts convex convex lens courſe defcribed degree diſcharge diſtance divifions eafily electric fluid electrified electrometer equal eſpecially eye lens faid falt fame fcreen fecond feems feen fhall fhews fhock fide filk filver fingle firſt fituated fize fmall focal diftance focus fome fometimes fouth fpark fpecific ftate ftrong fubftances fuch fufficient furface glaffes glafs glaſs heat hole inches increaſe inftrument infulated iron itſelf lefs lenfes light magnet magnifying meaſure mercury metallic moft moſt muft muſt neceffary needle nitrous acid north pole obferved object object lens paffing perfons phial Philofophical piece plate poffeffed pofitive pole prefent prifm purpoſe quantity rays reflected reflector refraction reprefents ſmall ſtate teleſcope temperature thefe thermometer theſe thofe thoſe tricity tube uſed veffel whilft wire zinc
Δημοφιλή αποσπάσματα
Σελίδα 287 - When the rising sun shines from that point whence its incident ray forms an angle of about 45° on the sea of Reggio, and the bright surface of the water in the bay is not disturbed either by the wind or...
Σελίδα 291 - ... let this mixture be rammed into a crucible of about an inch and a half in depth, till it be almoft full ; and let it be placed in...
Σελίδα 287 - ... palms, and nearly down to the sea, the observer will behold the scene of the same objects not only reflected from the surface of the sea, but likewise in the air, though not so distinct or well defined as the former objects from the sea.
Σελίδα 287 - Lastly, if the air be slightly hazy and opaque, and at the' same time dewy and adapted to form the Iris, then the abovementioned objects will appear only at the surface of the sea, as in the first case, but all vividly coloured or fringed witH red, green, blue, and other prismatic colours *. " As the day advances, the fairy scene gradually disappears.
Σελίδα 287 - Reggio, and the bright surface of the water in the bay is not disturbed either by the wind or the current, the spectator being placed on an eminence of the city, with his back to the sun, and his face to the sea ; on a sudden there appear in the water, as in a catoptric theatre, various multiplied objects, viz.
Σελίδα 418 - THE electric organs of the torpedo are placed on each side of the cranium and gills, reaching from thence to the semicircular cartilages of each great fin, and extending longitudinally from the anterior extremity of the animal to the transverse cartilage, which divides the thorax from the abdomen...
Σελίδα 203 - When the rings were examined by looking through the lenses in the opposite direction, the central spot appeared white, and, in other rings, red was opposite to blue, yellow to violet, and green to a compound of red and violet ; the colours formed by the transmitted and...
Σελίδα 140 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Σελίδα 513 - ... the attraction of their matter. There is an attraction exerted between the overcharged extremity of one magnetic body and the undercharged extremity of the other, on account of the attraction between that fluid and the matter of the body ; but, to explain the repulsion which takes place between their undercharged extremities, we...
Σελίδα 278 - ... the distance of the small circle, and also of the parallel lines from your eye; divide then the distance of the former by that of the latter, and you will have the magnifying power of the telescope required.