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Arc lights need carbon electrodes called carbon points (or simply "carbons") to work. Each carbon would only last on the order of several hours, and then needed to be replaced. In 1881, the use of carbons had become so widespread, and the profits had become so large, that it enticed W. H. Boulton, the foreman of the Brush Electric Company's ...
Lighting is the technology of illuminating an area, usually by artificial sources such as a lamp or flashlight. Lighting design is concerned with illumination in different settings, such as architectural lighting and theatrical lighting.
Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants. Indoor lighting is usually accomplished using light fixtures, and is a key part of interior design. Lighting can also be an intrinsic component of landscape projects.
Next, thrust in an inward and upward motion on the diaphragm. This will force air out of the lungs and remove the blockage. Repeat these abdominal thrusts up to five times, the doctor advised.
NYPD officers responded to an assault in progress and found that a 45-year-old man had been struck by a southbound train after being allegedly shoved onto the subway tracks.
Symptoms may include vision changes (seeing spots, blurriness, light sensitivity), a headache that won’t go away, shortness of breath, pain in your upper belly, nausea and/or vomiting, decreased ...
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