The Annals of Electricity Magnetism and Chemistry and Guardian of Experimental Science, Band 10Sherwood, Gilbert and Piper |
Im Buch
Ergebnisse 1-5 von 74
Seite 20
... increased as the lightning to a certain distance came down the steeple . To procure this easy passage , and avert the ravage oc- casioned by the want of it in future , as much as our present know- ledge in these matters will enable us ...
... increased as the lightning to a certain distance came down the steeple . To procure this easy passage , and avert the ravage oc- casioned by the want of it in future , as much as our present know- ledge in these matters will enable us ...
Seite 52
... increasing , or de- creasing in its variation , Mr. G. has very frequently , with a key , drawn it the contrary way several degrees , and then , by letting it return gently , till it has been within a degree , or less , of the place it ...
... increasing , or de- creasing in its variation , Mr. G. has very frequently , with a key , drawn it the contrary way several degrees , and then , by letting it return gently , till it has been within a degree , or less , of the place it ...
Seite 53
... increasing from about eight or nine o'clock in the morning , till about one or two in the afternoon , when the needle became stationary for some time ; after that , the absolute variation westward was decreasing , and the needle came ...
... increasing from about eight or nine o'clock in the morning , till about one or two in the afternoon , when the needle became stationary for some time ; after that , the absolute variation westward was decreasing , and the needle came ...
Seite 54
... increasing equally , the needle will be stationary , and the abso- lute variation will then be greatest ; but when the western magnetic parts are either heating faster , or cooling slower than the eastern , the needle will move eastward ...
... increasing equally , the needle will be stationary , and the abso- lute variation will then be greatest ; but when the western magnetic parts are either heating faster , or cooling slower than the eastern , the needle will move eastward ...
Seite 55
... increases from January to June , and decreases from June to December . THE MEAN DIURNAL VARIATION FOR EACH MONTH IN THE YEAR 1759 · January . February March April ... May June .... July August September October ... 7 ' 8 " 858 11 17 12 ...
... increases from January to June , and decreases from June to December . THE MEAN DIURNAL VARIATION FOR EACH MONTH IN THE YEAR 1759 · January . February March April ... May June .... July August September October ... 7 ' 8 " 858 11 17 12 ...
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
action ammonia antimony apparatus appears athal atmosphere atom ball battery bismuth body building carbonate carbonic acid cause cells cent charged chloride coal colour conductor connected considerable containing copper crystals cylinder decomposed decomposition degree diameter direction disc distance earth effect electric current electrometer electromotive force electroscope experiments exposed feet fire fixed formed galvanic glass grains hydrogen iron lightning liquid magnet mass mercury metallic communication motion muriatic muriatic acid needle neutral nitrate nitric acid nitrogen nitrous gas nitrous oxide north pole observed obtained oleic acid oxygen palladium paper phenomena piece pile plate platinum point of heat polarity portion potash produced Purfleet quantity rays resinous salt side silver solution spectrum spermaceti stone strata struck substance sulphate sulphuric acid surface temperature tension thermo-magnetic thunder tion tube vapour vitreous voltaic whilst winds wire yellow zinc
Beliebte Passagen
Seite 406 - The best process for fixing any of the photographs prepared with gold is as follows : — As soon as the picture is satisfactorily brought out by the auriferous liquid, it is to be rinsed in spring water, which must be three times renewed, letting it remain in the third water five or ten minutes. It is then to be blotted off and dried, after which it is to be washed on both sides with a somewhat weak solution of hydriodate of potash.
Seite 401 - ... of the total light reflected, and in short exposures is such as would easily escape notice. Nevertheless, if a slip of this paper be held for only four or five seconds in the sun (the effect of which is quite imperceptible to the eye), and when withdrawn into the shade be washed over with the ferrosesquicyanate of potash a considerable deposit of Prussian blue takes place on the part sunned, and none whatever on the rest, so that on washing the whole with water, a pretty strong blue impresion...
Seite 383 - The board being then inclined twenty or thirty degrees to the horizon, the alcoholic tincture (mixed with a very little water, if the petals themselves be not very juicy) is to be applied with a brush in strokes from left to right, taking care not to go over the edges which rest on the board, but to pass clearly over those...
Seite 382 - This is also the place to observe that the colour of a flower is by no means always, or usually, that which its expressed juice imparts to white paper. In many cases the tints so imparted have no resemblance to the original hue. Thus, to give only a few instances, the red damask rose of that intense variety of...
Seite 461 - We are of opinion that if the result produced by such a combination is either a new article, or a better article, or a cheaper article to the public, than that produced before by the old method, that such combination is an invention or manufacture intended by the statute, and may well become the subject of a patent.
Seite 49 - I feel convinced that we have to do with some thermic influence, and that it will eventually be found that some purely calorific excitement produces a molecular change, or that a thermo-electric action is induced which effects some change in the polarities of the ultimate atoms of the solid.
Seite 49 - ... considerably shortened by applying a very gentle heat, for a few minutes, to the under surface of the plate. The heat must on no account be so great as to volatilize the mercury.
Seite 354 - THE earlier expei imenters* on animal electricity noticed the power of well-burned charcoal to conduct the common galvanic influence. I have found that this substance possesses the same properties as metallic bodies in producing the shock and sparkf when made a medium of communication between the ends of the galvanic pile of Signer Volta.
Seite 226 - Professor Henry has been enabled to produce a magnetic force which completely eclipses every other in the whole annals of magnetism; and no parallel is to be found since the miraculous suspension of the celebrated oriental impostor in his iron coffin.
Seite 49 - I find the impression made in the metal, I confidently hope to be enabled to give to these singular and beautiful productions a considerable degree of permanence, so that they may be used by engravers for working on.