Source material on how Planck came up with h

[marcus]

I found a facsimile of the original article where Planck gives a value for h
(except that in May 1899 he was calling it b, instead of h.)
http://bibliothek.bbaw.de/bibliothek-digital/digitalequellen/schriften/anzeige/index_html?band=10-sitz/1899-1&seite:int=454

Here is the exact page where he gives his estimate of the value of h, or rather "b" as he calls it.
http://bibliothek.bbaw.de/bibliothek-digital/digitalequellen/schriften/anzeige/index_html?band=10-sitz/1899-1&seite:int=494

6.885 x 10^-27 cm²gr/sec

pretty close. lovely. slightly mysterious. May 18 1899
no time to comment, have to go out.

 

[DrClaude]

To complement:
https://physicsworld.com/a/max-planck-the-reluctant-revolutionary/