Convention, Volume 18 |
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Halaman 108
... object of artificial lighting is to provide a sufficient intensity of illumination upon the illumined surfaces . In practice , the illumination is generally required in order to permit some kind of work to be carried on . In any case ...
... object of artificial lighting is to provide a sufficient intensity of illumination upon the illumined surfaces . In practice , the illumination is generally required in order to permit some kind of work to be carried on . In any case ...
Halaman 111
... object , of , say , printed characters , is placed in a darkened box , sufficiently small to be readily carried in the pocket . The test object is exposed to illumination received from a translucent plate of porcelain or opal glass ...
... object , of , say , printed characters , is placed in a darkened box , sufficiently small to be readily carried in the pocket . The test object is exposed to illumination received from a translucent plate of porcelain or opal glass ...
Halaman 112
... object , for purposes of annulling the effect of any focal abnormalities of vision . A sliding shutter , movable by a milled - headed screw , permits the effective area of the opal glass plate to be reduced until the amount of light ...
... object , for purposes of annulling the effect of any focal abnormalities of vision . A sliding shutter , movable by a milled - headed screw , permits the effective area of the opal glass plate to be reduced until the amount of light ...
Halaman 113
... object just permits of its legibility . The detailed construction of our apparatus will be understood from an examination of Figs . 1 , 2 and 3 , which represent , respectively , a longitudinal cross- section , a transverse cross ...
... object just permits of its legibility . The detailed construction of our apparatus will be understood from an examination of Figs . 1 , 2 and 3 , which represent , respectively , a longitudinal cross- section , a transverse cross ...
Halaman 114
... object focused under full illumination . The shutter is then gradually moved over the window until the test object just remains legible , when the number of luces in the illumination of the table are shown by the index on the scale ...
... object focused under full illumination . The shutter is then gradually moved over the window until the test object just remains legible , when the number of luces in the illumination of the table are shown by the index on the scale ...
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Istilah dan frasa umum
alternating current amperes apparatus arc dynamos arc lamps arc lighting armature BEGGS boilers candle-power capacity carbons cell cent central station managers charge circuit Cleveland closed coil committee connected convention curve diagram direct current disruptive discharges distribution dynamo Edison illuminating companies efficiency Electric Company Electric Light Association Electric Light Company electrical horse-power electro-motive force energy feed storage gas engine gentlemen give horse-power hour Illuminating Company incandescent indicated horse-power induction installation instrument insulation interest Light and Power lightning arrester magnetic maximum measured monocyclic system National Electric Light open coil operation paper phase plant plates polyphase system pound of coal Power Company power wire practice PRESIDENT Professor question SEELY single-phase spark gaps standard candle steam storage storage battery tanks teaser coil three-phase three-phase system three-wire system to-day Total fixed annual transformers units voltage voltmeter volts watt hours watts