Articles RAREFIED AND CONDENSED AIR By G. VON LIEBIG See allHide authors and affiliations Science 30 Jul 1897:Vol. 6, Issue 135, pp. 157-163DOI: 10.1126/science.6.135.157 G. VON LIEBIG UNIVERSITY OF MUNICHFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.