TY - JOUR T1 - The Bakerian Lecture: On the Photographic Method of Mapping the Least Refrangible End of the Solar Spectrum JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 171 SP - 653 EP - 667 PY - 1880/01/01/ UR - http://dx.doi.org/10.1098/rstl.1880.0017 M3 - doi:10.1098/rstl.1880.0017 AU - de W. Abney, W. ER -