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Late 19th or early 20th century. This galvanometer was used at the transatlantic cable station, Halifax, NS, Canada Modern mirror galvanometer from Scanlab. A mirror galvanometer is an ammeter that indicates it has sensed an electric current by deflecting a light beam with a mirror. The beam of light projected on a scale acts as a long massless ...
Thomson pioneered the theory, which was distinct from the 17th century vortex theory of René Descartes in that Thomson was thinking in terms of a unitary continuum theory, whereas Descartes was thinking in terms of three different types of matter, each relating respectively to emission, transmission, and reflection of light. [54]
Ducretet et cie., later Ducretet Thomson was a French company founded by scientist Eugène Adrien Ducretet which produced, among other scientific instruments, an early "plate phonograph", or tinfoil disc player (1879) and a tinfoil phonograph for cylinders. [1]
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President-elect Donald Trump says he would prefer the US debt ceiling being completely abolished -- not just raised -- as congressional Republicans feud over a funding bill intensifies on Capitol ...
Moose's mom posted a video that's only about 12 seconds long, but it's really funny to watch. Moose found a wheelbarrow full of water out in his backyard and decided to hop on in and enjoy it.
The RCA Lyra X2400 is a portable audio/video recorder and player with a 3.5" LCD screen released around 2006. It has a CompactFlash slot, audio out, built-in speaker and RCA A/V inputs. [31] Recorded video is compressed with an XVID encoder. The included software, Blaze Media Encoder, can transcode from most popular video and audio formats.
A teen won’t let her older sister borrow her favorite dress — and now her sister is accusing her of being “selfish.”. The woman, 19, shared her situation on the popular Reddit forum “Am ...