<a href="https://en.wikipedia.org/wiki/Justus_von_Liebig" class="extiw" title="w:Justus von Liebig">Baron Gustus von Liebig</a> and the Giessen Laboratory in 1840 from the book <a href="https://en.wikisource.org/wiki/Biographies_of_Scientific_Men" class="extiw" title="s:Biographies of Scientific Men"><i>Biographies of Scientific Men</i></a>
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external text" href="https://archive.org/stream/biographiesofsci00grifrich#page/n123/mode/1up">Biographies of Scientific Men</a>