Research index·Journal articleNOTESNature·1 Mar 1905DOI10.1038/071420a0Journal articleFrom the research indexNOTESNature · 1 Mar 1905DOI10.1038/071420a0ReadRead at the publisherSaveCiteAdd to literature reviewNo PDF hereThe full text is at the publisherYou can read the abstract here, or open it at the publisher.DiscussionAdd to the discussionTopicsPhilosophyPhysicsNuclear magnetic resonanceRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report