The Braidwood Dispatch and Mining Journal 17 juli 1912: https://trove.nla.gov.au/newspaper/article/100645214
Popular Mechanics: https://books.google.nl/books?id=Tt4DAAAAMBAJ&pg=PA341&lpg=PA341&dq=this+tends+to+make+the+air+a+more+effective+blanket+for+the+earth&source=bl&ots=QvdH-SgFLl&sig=WiPUNOIzM6udOSTBm2VXzRQB9K8&hl=en&sa=X&redir_esc=y#v=onepage&q&f=false