Products & Materials EQUIPMENT NEWS Science 03 Jan 1958:Vol. 127, Issue 3288, pp. 42DOI: 10.1126/science.127.3288.42 Article Info & Metrics eLetters PDF Article Information vol. 127 no. 3288 42 DOI: https://doi.org/10.1126/science.127.3288.42 PubMed: 17779455 Published By: American Association for the Advancement of Science Print ISSN: 0036-8075 Online ISSN: 1095-9203 Copyright & Usage: © 1958 Other Contributors: American Association for the Advancement of Science Author Information Altmetric Article usage Article lifetimeLast 6 monthsThis monthArticle usage: March 2007 to December 2019 AbstractFullPdf Mar 2007001 Jul 2007001 Oct 2007001 May 2008001 Mar 2009001 Jul 2009001 Nov 2011001 Jan 2012001 Feb 2012001 Oct 2012001 Jun 2013001 Jan 2014001 May 2015001 Aug 2015001 Mar 2016001 May 2016001 Feb 2017001 May 2017002 Jul 2017001 Feb 2018001 Jun 2018001 Aug 2018001 Dec 2018002 Feb 2019002 Mar 2019002 Apr 2019004 May 2019003 Jun 2019001 Jul 2019004 Aug 2019002 Sep 2019001 Oct 2019006 Nov 2019002 Dec 2019001 View PDF Extract