Physical ReviewAmerican Physical Society, 1905 Volumes for 1903- include Proceedings of the American Physical Society. |
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A. H. TAYLOR absorption bands alternating current AMERICAN PHYSICAL SOCIETY amperes anode antenna apparatus atoms axis benzene carbon cathode cell cent CO₂ coefficient coil column compounds condenser constant copper curves decrease deflections determined diameter discharge effect electrical electrodes electromotive force equations experiments film four wires galvanometer gas action gases given glass graphite heat height hydrogen increase inductance infra-red intensity ionization lamp length lens lines liquid magnetic field maxima maximum mean measurements mercury metal meters method methyl mirror molecule negative ions observed obtained oscillation PHYS Physical Society plate platinum position potential difference pressure quartz radiation ratio readings receiving region resistance Resonant Capacity rotation shifting shown solution spark spectra spectrum surface Table temperature theory thickness tion tube twisted plane polarized vacuum vane vapor velocity volts water of crystallization wave wave-length zero
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Seite 130 - ... from the preliminary discharge will be explained in the latter part of this paper under the title, " Appearance of the Discharge." RESULTS OBTAINED. As a result of the experiments I have been able to determine the following properties of the electrodeless ring-discharge : 1 Recent Researches, p. 96. 1. The minimum volts per cm. acting around a vessel that are just necessary to start the white discharge at various pressures. 2. The existence of a minimum discharging potential for each gas occurring...
Seite 397 - On the .other hand, the other bands increase in intensity with increase in pressure, become a maximum at about 2 mm. pressure, then decrease in intensity with a further increase in pressure, which agrees with observations in the visible spectrum. All lines increase in intensity with increase in current as found in the visible spectrum.
Seite 360 - In addition to this, 19 compounds were examined to 2.7 fi, using a quartz prism. The following are some of the results obtained : 1. A study of isomeric compounds shows that the arrangement or bonding of the atoms in the molecule, ie, its structure, has a great influence upon the resulting absorption spectrum, which agrees with Julius.
Seite 400 - ... 1 Abstract of a paper presented at the Chicago meeting of the Physical Society on April 21, 1905INDEX TO VOLUME XX.
Seite 274 - I mm. thick, and hence easily bent to fit the cell, thus preventing evaporation. This form of cell is much better than that used in previous investigations, in that it can be thoroughly cleaned, while a new tin-foil ring was used for each new compound. A block of wood having an opening cut in it, over which the rocksalt cell was securely mounted, was placed in vertical ways before the spectrometer slit. The radiation from the Nernst heater passed through the opening in the block and through the rock...
Seite 388 - ... mm, so much reduced the astigmatism that the tips of the spectral lines could be seen in the field of the micrometer used in measurement. We thus avoid a shift due to overexposure, for, by setting the cross.hair upon the tip of the spark image, where it is just visible to the eye, we are certainly making use of minimum exposure conditions. The filar micrometer, manufactured by Bausch & Lomb, was reinforced by adjustable trusses to produce greater rigidity.
Seite 340 - As the band occurring from 3 to 3.4 u is a characteristic of carbohydrates so is this band a characteristic of the mustard oils. Of all compounds studied, the mustard oils are unique in having an enormous absorption band in the region of shorter wave-lengths, this side of 5 p.
Seite 55 - ... light. The edge of this strip was parallel to the faces of the electrodes, thus making the vanishing line parallel to the greatest dimension of the field of view. When electrodes of greatest length (127 cm.) were used, this strip was placed between the compensator and the analyzer, as the distance was too long to give good definition. The second section, the "compensator
Seite 275 - The method of observation consisted in projecting successive portions of the spectrum upon the radiometer vane and noting its deflection when the absorption cell was before the collimator slit, and also the deflection when the clear piece of rock salt was substituted. The ratio of the deflection through the cell to that through the plate of rock salt gave the transmission through the liquid directly, and more accurately than by finding the absorption of the empty cell, and deducting it. This also...
Seite 1 - I taken to maintain equality of temperature all over the surface of the hermetically sealed vessel, the liquid in the capillary tube would soon take very nearly the same level as it would have were its lower end open ; sinking to this level if the capillary...