Please explain where you get e=mc^2 from 1905 paper

I have been reading the original "Does the Inertia of a Body Depend
Upon Its Energy-Content?" 1905 paper by Albert Einstein and I really
don't see how Einstein concluded e=mc^2.

See the original paper at:

http://www.fourmilab.ch/etexts/einstein/E_mc2/www/

The last part says:

"Neglecting magnitudes of fourth and higher orders we may place

K0-K1 = 1/2(L/c^2)v^2

From this equation it directly follows that:--

If a body gives off the energy L in the form of radiation, its mass
diminishes by L/c²."

Now just how does this in any way directly follow???? He might as well
have said " ... and then a miracle happens and ...".

The equation above doesn't appear to contain any mass parameter. The
K0, K1 terms appear to represent a kinetic energy terms. It appears to
me to be saying that the difference in kinetic energy depends on the
energy L emitted by the system in question.

How do you get E=mc^2 from any of this?

-fhuemc

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