00648cam a2200205 4500 148971772 TxAuBib 20091208120000.0 130922s2013||||||||||||||||||||||||eng|u 43791 Project Gutenberg PGUSA eng TxAuBib Ostwald, Wilhelm. Natural Philosophy [Gutenberg] / Wilhelm Ostwald; translated by Thomas Seltzer. Project Gutenberg, 2013. Freely available. Electronic text. Seltzer, Thomas, translator. http://www.gutenberg.org/ebooks/43791 http://www.gutenberg.org/license Rights TXTLL