Nature, Volume 63

acid action animals appears application birds British cause characters chemical College complete connection considerable considered contains corresponding course curve dealing described determined direction discussion effect electrical engineering evidence examination exhibited existence experiments fact give given hydrogen illustrated important increase India Institute interest Italy knowledge known laboratory less light lines London mathematical matter means measure method natural notice November observations obtained occur organisms origin passed period photographs physical plants position possible practical present probably produced Prof published question rays recent record reference regard relation remarkable rocks Royal School scientific seems Society South species spectrum stars taken temperature theory tion University various volume whole