Skip to main content
  • Submit
  • About
    • Editorial Board
    • PNAS Staff
    • FAQ
    • Accessibility Statement
    • Rights and Permissions
    • Site Map
  • Contact
  • Journal Club
  • Subscribe
    • Subscription Rates
    • Subscriptions FAQ
    • Open Access
    • Recommend PNAS to Your Librarian
  • Log in
  • My Cart

Main menu

  • Home
  • Articles
    • Current
    • Special Feature Articles - Most Recent
    • Special Features
    • Colloquia
    • Collected Articles
    • PNAS Classics
    • List of Issues
  • Front Matter
  • News
    • For the Press
    • This Week In PNAS
    • PNAS in the News
  • Podcasts
  • Authors
    • Information for Authors
    • Editorial and Journal Policies
    • Submission Procedures
    • Fees and Licenses
  • Submit
  • About
    • Editorial Board
    • PNAS Staff
    • FAQ
    • Accessibility Statement
    • Rights and Permissions
    • Site Map
  • Contact
  • Journal Club
  • Subscribe
    • Subscription Rates
    • Subscriptions FAQ
    • Open Access
    • Recommend PNAS to Your Librarian

User menu

  • Log in
  • My Cart

Search

  • Advanced search
Home
Home

Advanced Search

  • Home
  • Articles
    • Current
    • Special Feature Articles - Most Recent
    • Special Features
    • Colloquia
    • Collected Articles
    • PNAS Classics
    • List of Issues
  • Front Matter
  • News
    • For the Press
    • This Week In PNAS
    • PNAS in the News
  • Podcasts
  • Authors
    • Information for Authors
    • Editorial and Journal Policies
    • Submission Procedures
    • Fees and Licenses

New Research In

Physical Sciences

Featured Portals

  • Physics
  • Chemistry
  • Sustainability Science

Articles by Topic

  • Applied Mathematics
  • Applied Physical Sciences
  • Astronomy
  • Computer Sciences
  • Earth, Atmospheric, and Planetary Sciences
  • Engineering
  • Environmental Sciences
  • Mathematics
  • Statistics

Social Sciences

Featured Portals

  • Anthropology
  • Sustainability Science

Articles by Topic

  • Economic Sciences
  • Environmental Sciences
  • Political Sciences
  • Psychological and Cognitive Sciences
  • Social Sciences

Biological Sciences

Featured Portals

  • Sustainability Science

Articles by Topic

  • Agricultural Sciences
  • Anthropology
  • Applied Biological Sciences
  • Biochemistry
  • Biophysics and Computational Biology
  • Cell Biology
  • Developmental Biology
  • Ecology
  • Environmental Sciences
  • Evolution
  • Genetics
  • Immunology and Inflammation
  • Medical Sciences
  • Microbiology
  • Neuroscience
  • Pharmacology
  • Physiology
  • Plant Biology
  • Population Biology
  • Psychological and Cognitive Sciences
  • Sustainability Science
  • Systems Biology

Table of Contents

May 15, 1930; vol. 16 no. 5

Physiology and Pathology

  • You have access
    ON THE DISTRIBUTION OF TABULAR ROOTS IN CEIBA (BOMBACACEAE)
    A. E. Navez
    PNAS May 15, 1930 16 (5) 339-344; https://doi.org/10.1073/pnas.16.5.339

Psychology

  • You have access
    ACTION CURRENTS IN THE AUDITORY NERVE IN RESPONSE TO ACOUSTICAL STIMULATION
    Ernest Glen Wever and Charles W. Bray
    PNAS May 15, 1930 16 (5) 344-350; https://doi.org/10.1073/pnas.16.5.344

Genetics

  • You have access
    MUTATIONS AND ALLELOMORPHISM IN THE GROUSE LOCUSTS (TETTIGIDAE, ORTHOPTERA)
    Robert K. Nabours
    PNAS May 15, 1930 16 (5) 350-353; https://doi.org/10.1073/pnas.16.5.350

Mathematics

  • You have access
    THE ELECTROMAGNETIC FIELD EXTERIOR TO A SYSTEM OF PERFECTLY REFLECTING SURFACES
    F. H. Murray
    PNAS May 15, 1930 16 (5) 353-357; https://doi.org/10.1073/pnas.16.5.353

Chemistry

  • You have access
    THE RATES OF SECOND-ORDER GAS REACTIONS
    Louis S. Kassel
    PNAS May 15, 1930 16 (5) 358-364; https://doi.org/10.1073/pnas.16.5.358

Astronomy

  • You have access
    ON THE PREDICTIONS OF TRANS-NEPTUNIAN PLANETS FROM THE PERTURBATIONS OF URANUS
    Ernest W. Brown
    PNAS May 15, 1930 16 (5) 364-371; https://doi.org/10.1073/pnas.16.5.364

Physics

  • You have access
    THE “REACTION-ISOCHORE” EQUATION FOR IONIZATION WITHIN METALS
    Edwin H. Hall
    PNAS May 15, 1930 16 (5) 371-373; https://doi.org/10.1073/pnas.16.5.371
  • You have access
    THE EFFECT OF LOW TEMPERATURES ON THE SENSITIVITY OF RADIOMETERS
    Sinclair Smith
    PNAS May 15, 1930 16 (5) 373-376; https://doi.org/10.1073/pnas.16.5.373
PreviousNext
Back to top

Browse PNAS issues

In this issue

  • Table of Contents
Sign up for alerts

Jump to

  • Physiology and Pathology
  • Psychology
  • Genetics
  • Mathematics
  • Chemistry
  • Astronomy
  • Physics

PNAS Highlights. Top research, news, and commentary delivered straight to your inbox.

Site Logo
Powered by HighWire
  • Submit Manuscript
  • Twitter
  • Facebook
  • RSS Feeds
  • Email Alerts

Articles

  • Current Issue
  • Special Feature Articles – Most Recent
  • List of Issues

PNAS Portals

  • Anthropology
  • Chemistry
  • Classics
  • Front Matter
  • Physics
  • Sustainability Science
  • Teaching Resources

Information

  • Authors
  • Editorial Board
  • Reviewers
  • Librarians
  • Press
  • Site Map
  • PNAS Updates

Feedback    Privacy/Legal

Copyright © 2021 National Academy of Sciences. Online ISSN 1091-6490