The Annals of Electricity Magnetism and Chemistry and Guardian of Experimental Science, Band 7Sherwood, Gilbert and Piper, 1841 |
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Seite 2
... inch wide , and a collar of leather , and thus forming a sphere , the interior diameter of which is 9 inches ; consequently exposing a surface of about 268.8 square inches . The lower hemisphere is fitted into a frame carrying buttons ...
... inch wide , and a collar of leather , and thus forming a sphere , the interior diameter of which is 9 inches ; consequently exposing a surface of about 268.8 square inches . The lower hemisphere is fitted into a frame carrying buttons ...
Seite 3
... inch diameter ( and exposing a surface therefore of 3 · 14 square inches ) was suspended by means of a well - varnished copper wire in the centre of the latter : the other extremity of the wire was connected with one of the cups of the ...
... inch diameter ( and exposing a surface therefore of 3 · 14 square inches ) was suspended by means of a well - varnished copper wire in the centre of the latter : the other extremity of the wire was connected with one of the cups of the ...
Seite 4
... inch of platinum wire inch diameter at red heat . I 150 2nd . The same amount of force was maintained by either hemisphere indifferently ; but when both conducting hemispheres were in metallic communication there was no increase of ...
... inch of platinum wire inch diameter at red heat . I 150 2nd . The same amount of force was maintained by either hemisphere indifferently ; but when both conducting hemispheres were in metallic communication there was no increase of ...
Seite 5
... inches in length , and inch in diameter , was then substituted for the balls , but the deviation did not rise higher than 60 ° . Thus the generating surface was increased from about three square inches to six and 9-4 with very little ...
... inches in length , and inch in diameter , was then substituted for the balls , but the deviation did not rise higher than 60 ° . Thus the generating surface was increased from about three square inches to six and 9-4 with very little ...
Seite 6
... inch in diameter , and presenting therefore a surface of 3.94 square inches . The sphere was charged as before , and when the ball was placed in the centre The index advanced When drawn nearly to the top 90 90 When thrust nearly to the ...
... inch in diameter , and presenting therefore a surface of 3.94 square inches . The sphere was charged as before , and when the ball was placed in the centre The index advanced When drawn nearly to the top 90 90 When thrust nearly to the ...
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
action alkali ammonia apparatus appears arsenic arsenious acid battery becomes blue bodies bromine cane carbon centre charge chemical chloride circuit coil colour combination compound conductor contain copper crystals current electricity deutoxide of nitrogen diameter diluted direction discharge dissolved distance distilled effect electric fluid electrolyte electrometer employed experiments fact galvanic galvanometer glass heat helix hydrogen inches increased indigo induction intensity iodine iron Leyden jar light liquid magnetic needle manner matter metallic muriatic muriatic acid negative nitric acid object observed obtained optic axes oxide oxyde oxygen paper pass phenomena piece plane platina platinum polarity pole portion positive potash potassa precipitate present prime conductor produced proportion quantity rays retina salt secondary current shock side silver similar smoke Smoked Salt solution spire substance sugar sulphate sulphuric acid surface takes place temperature tion transmitted tube voltaic whilst wire zinc zinc plate
Beliebte Passagen
Seite 91 - What would be the visual effect of simultaneously presenting to each eye, instead of the object itself, its projection on a plane surface as it appears to that eye?
Seite 383 - Calotype paper are for the most part invisible impressions. They may be made visible by the process already related, namely, by washing them with the gallo-nitrate of silver, and then warming the paper. When the paper is quite blank, as is generally the case, it is a highly curious and beautiful phenomenon to see the spontaneous commencement of the picture, first tracing out the stronger outlines, and then gradually filling up all the numerous and complicated details.
Seite 435 - DETRIMENTAL to the power of the battery: the copper plate is also covered with a coating of metallic copper, which is continually being deposited; and so perfect is the sheet of copper thus formed, that, on being stripped off, it has the polish and even a counterpart of every scratch of the plate on which it is deposited.
Seite 382 - Make a saturated solution of crystallized gallic acid in cold distilled water. The quantity dissolved is very small. Call this solution B.
Seite 384 - But the author prefers to make the copies upon photographic paper prepared in the way which he originally described in a memoir read to the Royal Society in February 1839, and which is made by washing the best writing paper, first with a weak solution of common salt, and next with a solution of nitrate of silver. Although it takes a much longer time to obtain a copy upon this paper, yet when obtained, the tints appear more harmonious and pleasing to the eye ; it requires in general from...
Seite 29 - We have, therefore, from these results, and those formerly obtained (III. 92.), the following series of directions of currents, one produced at the moment of beginning, and the other at that of ending of the battery current. At the beginning. At the ending. Primary current + + Secondary current — + Current of the third order . + — Current of the fourth order — , + Current of the fifth order ... + — 26. These two series, at first sight, may appear very different, hut, with a little attention,...
Seite 386 - ... to an ounce of distilled water ; it is quickly dried, and a second time washed with the same solution. It is then, when dry, placed for a minute in a solution of...
Seite 384 - ... more harmonious and pleasing to the eye; it requires in general from three minutes to thirty minutes of sunshine, according to circumstances, to obtain a good copy on this sort of photographic paper. The copy should be washed and dried, and the fixing process (which may be deferred to a subsequent day) is the same as that already mentioned. The copies are made by placing the picture upon the photographic paper, with a board below and a sheet of glass above, and pressing the papers into close...
Seite 117 - ... is seen at the intersection of the two lines of visible direction in which it is seen by each eye separately, whether these lines of visible direction terminate at corresponding points of the two retinae or not. But if we were to infer the converse of this, viz. that every point of an object in relief is seen by a single glance at the intersection of the lines of visible direction in which it is seen by each eye singly, we should be in error.
Seite 30 - Current of the fourth order — + Current of the fifth order + — 26. These two series, at first sight, may appear very different, but with a little attention, they will be seen to be of the same nature. If we allow that the induction at the ending of a galvanic battery should be opposite to that at the beginning of the same, then the sign at the top of the second column may be called minus instead of plus, and we shall have the second series 1 1- alternating precisely like the first.