The Astrophysical Journal, Volumen21University of Chicago Press, 1905 "Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967. Beginning in 2009, the Letters published only online. |
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Página 77
... amperes . ARC IN AIR Intensity when Current - Strength is Wave - Length Pressure 7.5 3.5 2.0 4703.2 ( arc line ) .... 4571.3 ( arc ) ... 760mm IO IO I 8 ∞ 1.0 0.5 amperes IO 8 8 7 760 6 6 I I O O 4481 ( spark ) .... . . . 760 O I IO I ...
... amperes . ARC IN AIR Intensity when Current - Strength is Wave - Length Pressure 7.5 3.5 2.0 4703.2 ( arc line ) .... 4571.3 ( arc ) ... 760mm IO IO I 8 ∞ 1.0 0.5 amperes IO 8 8 7 760 6 6 I I O O 4481 ( spark ) .... . . . 760 O I IO I ...
Página 78
... ampere was corroborated . In a vacuum it was found that these spark lines made their appearance in the arc when not a trace of them could be found in the arc surrounded by air at atmospheric pressure , using the same strength of current ...
... ampere was corroborated . In a vacuum it was found that these spark lines made their appearance in the arc when not a trace of them could be found in the arc surrounded by air at atmospheric pressure , using the same strength of current ...
Página 79
... amperes . This result adds further evidence for Crew's suggestion that spark lines are associated with steep potential gradients ,. 1. Spectrum of Magnesium Arc in a vacuum ( Current 3 amperes ) . 2. Showing A 4481 at cathode . Animal ...
... amperes . This result adds further evidence for Crew's suggestion that spark lines are associated with steep potential gradients ,. 1. Spectrum of Magnesium Arc in a vacuum ( Current 3 amperes ) . 2. Showing A 4481 at cathode . Animal ...
Página 119
... amperes with a frequency of 133 cycles per second . After being stepped up to about 600 volts , it was passed through a transformer , which raised the potential sufficiently to produce a spark about two centimeters in length . The spark ...
... amperes with a frequency of 133 cycles per second . After being stepped up to about 600 volts , it was passed through a transformer , which raised the potential sufficiently to produce a spark about two centimeters in length . The spark ...
Página 120
... amperes . The arc terminals were also of Norway iron rods , these being about a centimeter in diameter . Both the arc and spark lamps were placed ( the arc nearer the slit ) upon a platform which was movable upon two knife - edge ways ...
... amperes . The arc terminals were also of Norway iron rods , these being about a centimeter in diameter . Both the arc and spark lamps were placed ( the arc nearer the slit ) upon a platform which was movable upon two knife - edge ways ...
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amperes aperture apparatus appear ARTHUR SCHUSTER Astronomical Astrophysical Journal atmosphere calcium calcium vapor camera carbon cents collimator collimator lens colostat comet crystal dark diffuse disk dispersion bands distance disturbances electric Ellerman exciting source exposure faculæ flocculi fluorescence focal length give given glass grating Hale heated hydrogen hydrogen lines inches increase instrument intensity Lantern Slides layer lens Lick Observatory light LITHIA WATER magnetic maximum means measured metal mirror Mount Wilson nebula observations obtained optical orbit Orion oven paper photographs photosphere Piano pier plates position possible postpaid prism Professor RADIAL VELOCITIES radiation Range 8 P. M. red'c'd region Rowland sharp lines Solar Observatory spark lines spectra spectrograph spectroheliograph spectroscopic spectroscopic binary star stellar strong sun-spots Sun's taken temperature tion triplet tube University of Chicago Variable VOLUME wave-lengths Wehnelt width Yerkes Observatory York ΙΟ
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