I was wrong; it wasn’t an incubator, but a “chicken brooder.” Try having a look at these links:
http://books.google.com/books?id=Pxy4dCQ3I9QC&pg=PA136&lpg=PA136&dq=adamski+chicken+brooder&source=web&ots=CNdhSPG3Fa&sig=PclvhjoriW4cSqzqTpJWeNx5_Ss
https://webspace.utexas.edu/cokerwr/www/index.html/adamski.htm
I read that book when I was in grade school.