For those who might have an interest, there is a brief paper that summarizes Maxwell's equations and shows the connection between the different notations used: differential form, original form, quaternion form, and so on.
http://www.zpenergy.com/downloads/Orig_maxwell_equations.pdf On Mar 10, 2011, at 8:34 AM, Tom Azlin N4ZPT wrote: > Does not offend me Jim! > > Was just puzzled. > > The math is hard having forgotten most of that myself especially as I > only barely understood it back in college 40 years ago. The book I am > reading, "The Maxwellians," is more a science history book than a book > on the equations themselves. Interesting reading about the scientists > and how they worked this out. How some ideas survived and some did not. > > 73, tom n4zpt > > > > > On 3/10/2011 10:56 AM, JAMES ROGERS wrote: >> I am sure what you say has value Tom. It just seems this one has been >> going on a while. It did prompt me to go out and look up Maxwells >> equations just to see what you were all talking about and it is >> interesting but the math is certainly over my head. I hope my >> comments did not offend anyone. If so, I apologize, sincerely. >> >> 73s Jim On Mar 10, 2011, at 9:42 AM, Tom Azlin N4ZPT wrote: >> >>> Sorry you are not enjoying the thread James. >>> >>> Seems like many of the email on this reflector has nothing to do >>> with the K3. I'm an average user of the K3 (and an in progress K2 >>> builder). Talking about the actual equations and the history of >>> their development seems to me to be of general interest to many of >>> the readers of this list given the other responses. >>> >>> 73, tom n4zpt >>> >>> On 3/10/2011 10:06 AM, JAMES ROGERS wrote: >>>> Enough with the Maxwell Equations.... What in the world does this >>>> represent to the average K3 user? . On Mar 10, 2011, at 8:21 AM, >>>> Tom Azlin N4ZPT wrote: >>>> >>>>> Hi Kevin, >>>>> >>>>> What was asserted in "The Maxwellians" was that Maxwell died in >>>>> the middle of a rewrite. It did sound like there was a >>>>> controversy on his particle (or little eddies?) form of the >>>>> equations for a field approach. Perhaps that new version would >>>>> have dropped the use of quaternions? Have not studied the >>>>> equations since college, perhaps will go find the papers after >>>>> I finish this history book. Thanks for the tip on locating the >>>>> older forms. >>>>> >>>>> 73, tom n4zpt >>>>> >>>>> On 3/10/2011 1:46 AM, Kevin Rock wrote: >>>>>> There was a group which disliked his use of quaternions so he >>>>>> was forced to rewrite the system into other systems. Most of >>>>>> the work was carried out by others but for him to publish he >>>>>> needed peer review so he caved into the larger group. I am >>>>>> reading his original work from 1873 and finding it very >>>>>> enlightening. Even though I have studied the >>>>>> Heaviside-Gibb's version of the Maxwell equations many times >>>>>> the quaternions he used in the original paper were very hard >>>>>> to find. Luckily they are proliferating online these days. >>>>>> Kevin. KD5ONS >>>>>> >>>>>> >>>>>> On Wed, 09 Mar 2011 15:31:18 -0800, David >>>>>> Cutter<[email protected]> wrote: >>>>>> >>>>>>> I don't recall that from his biography, I'll have to read >>>>>>> it again. Interesting. >>>>>>> >>>>>>> David G3UNA >>>>>>> >>>>>>> >>>>>>>> Hi Kevin, >>>>>>>> >>>>>>>> Was not Maxwell that condensed the hard to understand >>>>>>>> original theory. Was some his disciples, aka "The >>>>>>>> Maxwellians," that finished the theory in the present >>>>>>>> form. FitzGerald, Lodge, and Heavyside plus others. >>>>>>>> >>>>>>>> Am just now reading "The Maxwellians" that has this >>>>>>>> story. >>>>>>>> >>>>>>>> 73, tom n4zpt >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On 3/6/2011 5:37 PM, Kevin Rock wrote: >>>>>>>>> I have always wondered how he condensed the original >>>>>>>>> twenty equations in twenty unknowns down to just four >>>>>>>>> of them. The quaternions he used initially were out a >>>>>>>>> favor with the physics community of the day so he >>>>>>>>> needed to get them into vector form. Heaviside did a >>>>>>>>> good job but how do you characterize a system with >>>>>>>>> twenty unknowns in four equations? What has been lost >>>>>>>>> in the translation? Kevin. KD5ONS >>>>> >>>>> ______________________________________________________________ >>>>> Elecraft mailing list Home: >>>>> http://mailman.qth.net/mailman/listinfo/elecraft Help: >>>>> http://mailman.qth.net/mmfaq.htm Post: >>>>> mailto:[email protected] >>>>> >>>>> This list hosted by: http://www.qsl.net Please help support >>>>> this email list: http://www.qsl.net/donate.html >>>> >>>> JIM ROGERS, W4ATK [email protected] >>>> http://web.me.com/jimrogers_w4atk K3/100 P3 K2/10 >>>> >>>> >>>> >>>> >>>> >>> >>> ______________________________________________________________ >>> Elecraft mailing list Home: >>> http://mailman.qth.net/mailman/listinfo/elecraft Help: >>> http://mailman.qth.net/mmfaq.htm Post: >>> mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net Please help support this >>> email list: http://www.qsl.net/donate.html >> >> JIM ROGERS, W4ATK [email protected] >> http://web.me.com/jimrogers_w4atk K3/100 P3 K2/10 >> >> >> >> >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
