{"action":"opened","issue":{"url":"https://api.github.com/repos/ericmazur/PnPbook/issues/1","labels_url":"https://api.github.com/repos/ericmazur/PnPbook/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/ericmazur/PnPbook/issues/1/comments","events_url":"https://api.github.com/repos/ericmazur/PnPbook/issues/1/events","html_url":"https://github.com/ericmazur/PnPbook/issues/1","id":103938142,"number":1,"title":"Maxwell Equations","user":{"login":"ericmazur","id":2316175,"avatar_url":"https://avatars.githubusercontent.com/u/2316175?v=3","gravatar_id":"","url":"https://api.github.com/users/ericmazur","html_url":"https://github.com/ericmazur","followers_url":"https://api.github.com/users/ericmazur/followers","following_url":"https://api.github.com/users/ericmazur/following{/other_user}","gists_url":"https://api.github.com/users/ericmazur/gists{/gist_id}","starred_url":"https://api.github.com/users/ericmazur/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ericmazur/subscriptions","organizations_url":"https://api.github.com/users/ericmazur/orgs","repos_url":"https://api.github.com/users/ericmazur/repos","events_url":"https://api.github.com/users/ericmazur/events{/privacy}","received_events_url":"https://api.github.com/users/ericmazur/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/ericmazur/PnPbook/labels/ch30","name":"ch30","color":"78cefb"},{"url":"https://api.github.com/repos/ericmazur/PnPbook/labels/typo","name":"typo","color":"ab9b35"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-08-30T18:23:09Z","updated_at":"2015-08-30T18:23:09Z","closed_at":null,"body":"John Denker: Referring to the Maxwell equations, on page 800 it says:\n\"Together with conservation of charge, these four equations\ngive a complete description of electromagnetic phenomena.\"\n\nThe first clause is wrong coming and going.  Surely you\nmeant to say \"Together with the Lorentz force law, ....\"\n\n a) Conservation of charge is a corollary of the Maxwell\n  equations.  Proving this is trivial -- but interesting.\n\n b) The Lorentz force law is necessary, but it is not \n  a corollary of the Maxwell equations."}}