Research index·Journal articleNotesNature·11 Aug 1921NobleIDark:/48914/w1/20260515/B70CD955DOI10.1038/107754a0Journal articleNotesNature · 1921 · SubscriptionNobleIDark:/48914/w1/20260515/B70CD955DOI10.1038/107754a0ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionTopicsBiologyRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report
