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English: Engineering drawing of the 1869 optic, and sectional view of it within the 1869 lantern, of Wolf Rock Lighthouse (UK), showing its innovative method of flashing alternately white and red; adjacent chart shows its interaction with other nearby lights off the Cornish coast.
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Canik is one of the main municipalities in Samsun, Turkey. Canik may also refer to: Canik Mountains, Turkey; Canik beyliks, a group of beyliks, Turkey, historical;
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Nearly all dogs enjoy hiking. Just make sure you work up their fitness gradually for the task at hand. And while we might fuss about the forecast and try to time our adventure to skip the showers ...
Credit - Carol Yepes—Getty Images. L enette Sparacino has had dental issues for as long as she can remember. “I’ve probably had at least 30 cavities over my lifetime, if not more,” she ...
Stadiametric rangefinding is used for surveying and in the telescopic sights of firearms, artillery pieces, or tank guns, as well as some binoculars and other optics. It is still widely used in long-range military sniping , but in many professional applications it is being replaced with microwave , infrared , or laser rangefinding methods.
A sky quality meter (SQM) is an instrument used to measure the luminance of the night sky. It is used, typically by amateur astronomers , to quantify the skyglow aspect of light pollution and uses units of " magnitudes per square arcsecond" favored by astronomers.