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Talk:Joseph Henry

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influence around Washington. For the fact that he became very involved with Lowe prior to and during the war is of great significance, especially if he is an electrical scientist working with a gasman like Lowe. His letter to Cameron is of particular interest because he is a man of science and not just an "electrician." (I say with tongue in cheek.) He had a similar letter written to Capt Whipple of the Topographical Engineers, Lowe's first assignment, digging into the nuts and bolts of ballooning with the intent of influencing him to retain Lowe's services. He had the whole of the scientific community interested in Lowe's projects. But I am not so married to the article that I can't see the section edited. So feel free to truncate it.
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been in charge of weather observation in New York for several years in his early career, and could see how a baloon could navigate by ascending to different altitudes where the wind direction naturally varied. While lecturing at the Albany Academy, Henry had done several interesting demonstrations on pneumatics and had studied the combustion of hydrocarbons. Henry took a great interest in Lowe's endeavors so much as to support and promote him among some of the more prominent scientists and institutions of the day. On Henry's recommendation Lowe went on to form the Union Army Balloon Corps and served two years with the Army of the Potomac as a Civil War Aeronaut."
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simple that it would be obvious to Henry and must have been accidently rediscovered by numerous electrical experimenters and technicians. The next step of using a buzzer as a door-bell would also be obvious because electromagnets were being used to trigger mechanical "annunciators" shortly after the electromagnet was invented. Each annunciator was an electromagnet which attracted an armature which unlatched a hinged flap of brass which rotated by its own weight to a visible position that "announced" a visitor who pressed a button at the door to connect battery current to the electromagnet. Sorry, I don't have a reference for this; this from memory.
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put this one in the dust bin. That any type of electrical buzzing device was developed is still highly unlikely. The only thing that really used a magnetic conductor was the telegraph, and it was a keyed DC current device, not a buzzer. Many late 1800 homes had cranking bells at the door. It isn't until city electrification comes about that an electric door summoning device is even applicable. A Ralph Corbett is accredited with developing a two toned doorbell which was marketed by Nu Tone in 1936. --
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Smithsonian Institution, Washington, 1997. Moyer's a History of Science professor at Virgina Tech; perhaps someone should recruit him for this article. Anyway, the biography was partly supported by the Smithsonian, and was intended to celebrate the bicentennial of Henry's birth. I'm not prepared yet
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I would conjecture that the door buzzer preceded the "ding-dong" doorbell. It is a simple magnetic device, but one that requires alternating current to operate. There were never any homes with electrical provisions prior to 1900 that would call for the use of electric doorbells. So we can pretty much
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By the way! Prof. Lowe was extremely proficient working around the volatile gas. Hydrogen has a rise rate of 400 feet per second, so with the envelope well over his head, he was not wafting around in a cloud of hydrogen gas where a telegraph spark might do a Hindenburg on him. He used to go up in the
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The edited section could be something like "Prof. Henry was introduced to Prof. Thaddeus Lowe, a balloonist from New Hampshire who had taken interest in the phenomena of lighter-than-air gases, and exploits into meteorology, in particular, the high winds which we call the Jet stream today. Henry had
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The section on Lowe is far longer than all the discussion of Henry's groundbreaking electrical work. I recommend that this section be boiled down to 2 sentences with a link to the main Lowe article. The implication is that Henry's connection to Lowe is his main claim to fame, which is not at all the
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Maybe add a little section about his family life? I know his wife was his maternal first cousin and they had four children that survived infancy... added them to the infobox. Don't have time now to dig through the Smithsonian's online files on him, but poked around enough to tell that they have a
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I agree that the buzzer is a simple magnetic device and preceded the ding-dong doorbell. But the buzzer does not require "alternating current to operate". The buzzer generates AC. The principle of repetitively interrupting DC battery current whenever an electromagnet attracts an armature is so
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Thank you very much for your note on Henry's article. This edit was done when I was first writing for wikipedia, and my exuberance did find me overwriting articles. There's obviously something more to Prof. Henry than his electrical work. He seemed to be a highly revered man of science with great
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WRT the comment on winding an electromagnet when using a single battery vs multiple batteries. At the risk of being pedantic, should this be single-cell battery vs multiple batteries or does it really mean a single battery (regardless of number of cells) vs multiple batteries? Why is this
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The page states that Henry died on May 13, 1878; while the side-box shows a photo of Henry, dated 1879, in which he looks very much alive! (The box also states that Henry was the second President of the NAS from 1868-1879.) What a clever fellow was our Joseph!
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I was intending to comment on this very point when I saw that the point had already been made. I would have edited the entry but I could not make out what the point of the entry was. If it cannot be clarified, I would suggest removing it altogether,
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The portrait is signed at the bottom right as 1879. Likely, the portrait was done from a photo taken when he was alive, as that was pretty common for the time. The photo's source doesn't provide more detail there, sorry.
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to make any changes to the main article based on my reading of this biography. I am, however, not a fan of Coulson's biography. I also have a pleasant, children's biography in my collection: Jahns, Patricia,
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It's a very interesting and enlightening article, to be sure, however I have doubts that the same article posted on two different sites can really used as two citations. Feels like cheating.
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where firefighter Joseph Henry is listed among those killed. He should be mentioned here. I would do it myself, but am too depressed from reading the names of the dead. -
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notes he died in 1878 and he wasn't succeeded in the role until April 1879, so I believe this clarifies the mistake made by a previous user. Hope this helps! --
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dark using his oxyhydrogen lamps to light his inflation procedures. That's alot of hydrogen gas, but Lowe's safety record was impeccable.
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I've added a section for the NAS details and added a cite clarifying his tenure ended at the time of his death in 1878. This
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https://web.archive.org/web/20110428174213/http://www.princeton.edu/physics/about-us/history/memorable-members/joseph-henry/
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joseph henry was the cockiest person of his time, and that is why he named his SI unit after himself, what an asshole
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https://web.archive.org/web/20090803084613/http://siarchives.si.edu//history/exhibits/baird/bairdb.htm
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https://web.archive.org/web/20061209134636/http://www.nas.edu/history/members/henry.html
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1398: 914: 911: 600: 1277:,Thanks. I wonder what NAS proceedings/minutes say about Henry's term as President? 1129: 1009: 24: 1040:
https://www.princeton.edu/physics/about-us/history/memorable-members/joseph-henry/
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I've added a reference to the (relatively) recent biography: Moyer, Albert E.,
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Some philanthropic AH left this line on the very top of the front page:
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Casualties of the September 11, 2001 Terrorist Attacks: City of New York
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As I remarked in my book on Henry's friend, Prof. Thaddeus Lowe:
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http://siarchives.si.edu/history/exhibits/baird/bairdb.htm
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for additional information. I made the following changes:
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I removed the unreferenced candy-bar trivia section. -
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