O odkryciach i wynalazkach
Odczyt popularny wypowiedziany dnia 23 marca 1873 r.
pl
~59 minutes (57K characters)
Produced by Ewa Jaros and the Online Distributed Proofreading Team at http://dp.rastko.net (this file was produced from images generously made available by CBN Polona - http://www.polona.pl).
Project Gutenberg