Talk:Joseph Henry

message: I note this page is linked to Casualties of the September 11, 2001 Terrorist Attacks: City of New York 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. - Paul, in Saudi 17:15, 16 January 2004 (UTC)
thread_title:  Assorted 

message: Some philanthropic AH left this line on the very top of the front page:
::joseph henry was the cockiest person of his time, and that is why he named his SI unit after himself, what an asshole
As I remarked in my book on Henry's friend, Prof. Thaddeus Lowe:
::"The perception of Lowe (or Henry) as pompous, unyielding, egotistical, and overbearing is best left to those who can only envy their brilliance if they cannot possess it." Magi Media 19:49, 29 July 2006 (UTC)
thread_title: What an AH!!!

message: about.com claims he invented the doorbell in 1831... is it to be considered reliable? Lo'oris - ロホリス 22:05, 25 September 2006 (UTC)
replies: text: 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 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. --Magi Media (talk) 05:42, 7 August 2008 (UTC)
replies: text: 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 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.  Greensburger (talk) 16:40, 7 August 2008 (UTC)
thread_title:  Ding Dong! 

message: I've added a reference to the (relatively) recent biography: Moyer, Albert E., Joseph Henry: The Rise of an American Scientist, 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 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, Joseph Henry: Father of American Electronics, Rutledge Books, Englewood Cliffs, NJ, 1970. - EAS 02:19, 28 September 2006 (UTC)
thread_title:  Moyer's 1997 Biography 

message: 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 difference in winding significant? - Michael Daly 19:41, 14 July 2007 (UTC)
thread_title:  Single battery vs Multiple batteries 

message: I removed the unreferenced candy-bar trivia section. - Astrochemist 01:01, 29 October 2007 (UTC)
thread_title:  Trivia section 

message: 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 lot of information.  And his daughter Mary wrote a fairly historically important diary: an observation of the Civil War in D.C. Enchanting catalyst (talk) 15:58, 14 February 2012 (UTC)
thread_title:  Family life? 

message: Hello fellow Wikipedians,
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*Added archive https://web.archive.org/web/20061209134636/http://www.nas.edu/history/members/henry.html to http://www.nas.edu/history/members/henry.html
*Added archive https://web.archive.org/web/20110428174213/http://www.princeton.edu/physics/about-us/history/memorable-members/joseph-henry/ to https://www.princeton.edu/physics/about-us/history/memorable-members/joseph-henry/
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thread_title:  External links modified 

message: Hello fellow Wikipedians,
I have just modified one external link on Joseph Henry. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20090803084613/http://siarchives.si.edu//history/exhibits/baird/bairdb.htm to http://siarchives.si.edu/history/exhibits/baird/bairdb.htm
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thread_title:  External links modified 

message: 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! George963 au (talk) 00:47, 5 November 2023 (UTC)
replies: text: 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. --Engineerchange (talk) 03:26, 5 November 2023 (UTC)
replies: text: @Engineerchange,Thanks. I wonder what NAS proceedings/minutes say about Henry's term as President? George963 au (talk) 07:02, 20 November 2023 (UTC)
replies: text:  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 specific page 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! --Engineerchange (talk) 16:08, 20 November 2023 (UTC)
replies: text: Much clearer, thank you. George963 au (talk) 14:59, 30 November 2023 (UTC)
thread_title:  Posthumous Henry? 

message: 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. TRS (talk) 03:13, 29 November 2023 (UTC)
replies: text: Thanks for the note; I made the change. --Engineerchange (talk) 06:33, 29 November 2023 (UTC)
replies: text: Fabulous, thank you for doing what you do :) TRS (talk) 06:40, 29 November 2023 (UTC)
thread_title:  Citations 13 and 14 are to identical article