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Newsgroups: sci.physics.relativity
Subject: Re: E = 3/4 mc? or E = mc?? The forgotten Hassenohrl 1905 work.
From: nospam@de-ster.demon.nl (J. J. Lodder)
Reply-To: jjlxa31@xs4all.nl (J. J. Lodder)
Date: Sat, 7 Dec 2024 22:35:57 +0100
References: <9f1cd556912a273a8946c77614611242@www.novabbs.com> <8a0014e4135992c8ec7bd3f2f1983164@www.novabbs.com> <d906fde3148d43d339b1663f1127216a@www.novabbs.com> <13877dcc9c6a6f2dd8056d8c05f0c661@www.novabbs.com> <a7d26012926823b22e139af8670cbbe7@www.novabbs.com> <df76d88c3e9729de443afca2c0cf99fa@www.novabbs.com> <2c831e6c7e0103c00fcebe8074fec8db@www.novabbs.com> <7d37d6e841cd1936217b21a5847fc507@www.novabbs.com> <7511bb1b9b748c76df265f91eaaa468a@www.novabbs.com> <67503f94$0$12915$426a74cc@news.free.fr> <3c8abe81804e4c5b6ced7aefae766c7d@www.novabbs.com> <6750b8d4$0$29710$426a74cc@news.free.fr> <2Ji4P.2$4s%.1@fx15.ams4> <6751f410$0$518$426a74cc@news.free.fr> <geD4P.802$qW31.662@fx07.ams4> <675357ca$0$28494$426a74cc@news.free.fr> <7dde1f4c26d5621d09432295bd146ac7@www.novabbs.com> <67542b7b$0$5218$426a74cc@news.free.fr> <6c7c9526f2de83d788e8f50df99118f0@www.novabbs.com> <YoecnZjC9d4oBcn6nZ2dnZfqnPsAAAAA@giganews.com>
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Ross Finlayson <ross.a.finlayson@gmail.com> wrote:

> O.W. Richardson's "The Electron Theory ..." is really pretty
> great, he spends a lot of time explaining all sorts of
> issues in systems of units and algebraic quantities and
> derivations and the inner and outer and these things,
> it's a 100 years old yet I'm glad to be reading it now.

Yes, in those long past times every competent physicist
understood about systems of units and dimensions.
This has been lost as a consequence of general 'SI-only' education.

A more readily accessible (and excellent) source for the subject
is in the appendices of Jackson, Classical Electrodynamics.
Unfortunately the subject is not covered adequately in Wikipedia,
(afaics)

Jan