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| 1 | Round |
| different times. Row, Row, Row Your Boat is a well known children's round for 4 voices. When the voices... voices singing a ground (that is a never changing repeating part). The first published rounds in English... knife. Many of the rounds printed by Ravenscroft also appear in a 1580 manuscript (KC 1), and several ... | |
| 2 | Sodium vapor lamp |
| argon gas to start the gas discharge, so when the lamp is turned on it emits a dim red/pink light to... Pressure Sodium Lamps" are the most efficient light source — up to 210 lm/W. Therefore they are... Sodium Vapor Lamp is a gas discharge lamp which uses sodium in an excited state to produce light ... | |
| 3 | Neon lamp |
| Neon lamps are small bulbs filled with neon and used as indicator bulbs producing a orange/red... produced by the action of currents at high frequencies that are around the tube. A neon lamp can be... be used as a simple flashing lamp or audio oscillator. In the 1960s GE and other firms made special ... | |
| 4 | Three wishes joke |
| There are many variations of the three wishes joke . Typically, a person finds an old lamp, rubs it and is granted three wishes by the genie in the lamp. The person makes their first two wishes and... nephrologist (doctor) is out playing his usual Thursday morning round of golf. The game isn't going so ... | |
| 5 | Street light |
| because low pressure sodium lamps emit lower intensity, monochromatic light. Observatories can filter the... A streetlight in front of a red sky at night A street light , also known as a light standard , is a raised light on the edge of a road, turned on or lit at a certain time every night. Modern ... | |
| 6 | Sanctuary lamp |
| A sanctuary lamp is a red light which is hung or displayed in the Churches of those Christian... the vicinity of the altar, indicating that anyone approaching the altar should genuflect (= bow by bending the knee and inclining the head), to show respect for Christ, who according to the theology ... | |
| 7 | Center High Mounted Stop Lamp |
| into a spoiler. A CHMSL is usually thought of as a car safety feature. The stop lamps on vehicles are... effect is worse in North America, where the same red lights are generally used for all three functions. There was a need to place an additional stop lamp on vehicles to supplement the two traditional ... | |
| 8 | Lighting |
| Lighting is the illumination of an area, usually by artificial sources such as a lamp or... of the street furniture. In built-up areas streets often have lighting, usually by lamp-posts...., in front, traffic signs, etc., and to make the vehicle more visible, and red tail-lights in the ... | |
| 9 | Timeline of lighting technology |
| demonstrates arc-lighting. 1815 Humphry Davy invents the miner's safety lamp. 1835 James Bowman Lindsay... fluorescent lamp 1875 Henry Woodward patents the electric light bulb. 1876 Pavel Yablochkov invents the Yablochkov candle, the first practical carbon arc lamp, for public street lighting in Paris. 1879 ... | |
| 10 | High-intensity discharge |
| ... | |
| 11 | DLP |
| lamp through the color wheel (which has the three primary colours: blue, red, and green) and then to... split light from the lamp, and each primary colour of light is then routed to its own DLP chip, then... televisions. DLP was developed by Texas Instruments, which is also currently the only producer and ... | |
| 12 | Oil lamp |
| might rub in hopes of summoning a Genie (as in the tale of Aladdin ). "Rubbing a lamp" was a common household chore to clean and polish it. Sometimes the term "oil lamp" is applied to the modern... ghee; in ancient Persia, by petroleum that was found oozing freely from the ground. Olive oil lamps ... | |
| 13 | Power dome |
| ... | |
| 14 | Davy lamp |
| The Davy lamp is a safety lamp devised in 1815 by Humphry Davy. It was created for use in coal... temperature and that if such heating is prevented combustion cannot occur. If the flame in a lamp is... screen is below the ignition temperature of the gas. The first trial of a Davy lamp with a wire sieve ... | |
| 15 | Joseph Hinks |
| Joseph Hinks was a British inventor, working in Birmingham. He patented improvements to oil lamps, marketing the resultant Duplex lamp. The company, James Hinks & Son, of 91-96 Great Hampton Street... in Birmingham. Bibliography Lamp For Burning Petroleum , James Hinks and Joseph Hinks, in ... |