News & CommentScientific Events THE ASSOCIATION OF CONSULTING CHEMISTS AND CHEMICAL ENGINEERS See allHide authors and affiliations Science 16 Nov 1928:Vol. 68, Issue 1768, pp. 474DOI: 10.1126/science.68.1768.474 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 68, Issue 176816 November 1928 Table of Contents Print Table of Contents Front Matter (PDF)