Proceedings of the Physical Society, المجلد 18Institute of Physics and the Physical Society., 1903 |
المحتوى
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acid aluminium angle apparatus approximately astigmatic atomic weights axis bulb calculated capacity centimetres centre Chappuis chlorobenzene coefficient coil colour condenser constant copper correction curve cylinder deduced deflexion density determined diameter dimensional dimensional analysis dimensions displacement distance effect elastic electric electrometer employed equation experiments film focal line formula galvanometer given gives glass Hence horizontal hydrogen induced instrument J. J. Thomson leak length lens light liquid magnetic means measured mercury metal method mirror moment of inertia needle observations obtained paper Phil physical plane plate platinum Poisson's ratio portion position potential potentiometer pressure prism Prof quantity radiant-point radius ratio rays refracted resistance scale shown silica solid solution specific heat surface temperature theory thermoelectric effects thermometer thickness thorium toluene tube units vapour variation vertical volts volume wire zero
مقاطع مشهورة
الصفحة 240 - ... has made the construction of a suitable break a matter of importance. The ordinary break is unsuitable because of the wearing away at the point of contact, and there are objections to the use of mercurial breaks. The portable mechanical break which was shown by Dr. Dawson Turner consists of two metallic rollers with their axes parallel and kept in contact by a spring. One of the rollers has a cam attached to its spindle, and can be made to rotate by means of a small electric motor. Once in each...
الصفحة 496 - ... curves IV. and XVII., will define the focal area, that is to say, all the light from the corresponding radiant-point will after refraction pass through the area between these curves. If we suppose ourselves at the radiantpoint and facing the cylinder half the light will be bent from left to right and the other half from right to left, but it will all pass through the central plane containing the radiantpoint and the axis, in the area between these two curves. It is easily seen that the width...
الصفحة 422 - Steiner. is true for bath a plane laminar body and a thin three-dimensional body, and states that the moment of inertia of a body about any axis is equal to its moment of inertia about a parallel axis through its...
الصفحة 3 - A paper on a determination of the ratio of the specific heats at constant pressure and at constant volume for air and steam was read by Mr.
الصفحة 235 - KI-KO employs the symbol pt, its value depending on the sample of platinum chosen. In order to reduce to the standard scale of temperature the indications of any platinum thermometer, it is necessary to know the law connecting T and pt.
الصفحة 49 - ... and unloaded, are treated at length, and it is shown that by a proper arrangement of supports the alteration in length between two points due to bending can be rendered so small as to be of no practical importance. In the metre prototypes of X section the divisions occur on the neutral surface and their distance apart is unaffected by stretching of the material. In the case of magnetometer deflection bars it is advisable to have the magnet light and as near to the bar as possible. Mr. Watson...
الصفحة 521 - ... absorption is different when the incident light has a component of the electric vector perpendicular to the surface, which, of course, is not the case when the incidence is normal. If the light is polarized to start with, this is found to be the case, the colour of the transmitted light being bluish-purple when the electric vector is perpendicular to the plane of incidence, and red when it is parallel to this plane in which case there is a component normal to the surface. These changes are not...
الصفحة 283 - Trans. 1854, p. 321), and still remain among the most important data for the determination of the thermodynamical correction. The history of this investigation is contained in Sir Wm. Thomson's Mathematical and Physical Papers, vol. i. pp. 333-455, and need not be considered in detail ; but it will be necessary to give a brief account of the method for the elucidation of the notation adopted and the method of calculation proposed in the present paper. 2. Theory of the Porous-Plug Experiment *. The...
الصفحة 195 - ... and 80°, when extrapolated, in a precisely similar manner. It was quite possible, as he (Prof. Callendar) had previously suggested, that the expansion of porcelain between o° and 100° was anomalous. It appeared certain that some anomaly in the expansion at 800" was indicated both in the experiments of Bedford and also in those of Holborn and Day. It was also clear that Dr. Chappuis' results for Bayeux porcelain when extrapolated would agree with Bedford's at a temperature a little above 100°...
الصفحة 56 - ... of thermometers. He would like to ask why it was necessary to use supports instead of allowing a standard to rest on a flat surface. The chairman said that the paper was important because of its bearing on the question of the relation between the units of different nations. He drew attention to the alteration of the factor converting metres into inches, and asked if it was due to alterations in the properties of matter or to errors of observation. The two legal definitions of the gallon differ...