An artikel about the "monorator" -- a wood gasifier that ran on soaking wet
wood. This was the state of the art by the end of WW2.
As HTML, and as
gzipped postscript, about 120k.
"German ideas on improvements on wood gasifiers."(English translation):
H. Lutz led a research institute in Germany during WW2. Among other
things, they experimented with recapturing exhaust heat, with interesting
results. Only as
PostScript (gzip), about 100k.
Also read the Swedish professor Hubendick's comments on Lutz. "Gasifier
efficiency" (English translation),
PostScript (gzip), about 40k.