TY - JOUR T1 - Report upon a Letter Addressed by M. Le Baron de Humboldt to His Royal Highness the President of the Royal Society, and Communicated by His Royal Highness to the Council JF - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843) VL - 3 SP - 418 EP - 428 PY - 1830/01/01/ UR - http://dx.doi.org/10.1098/rspl.1830.0269 M3 - doi:10.1098/rspl.1830.0269 AU - Christie, S. AU - Airy, G. ER -