TY - JOUR T1 - On the Blue Colour of the Sky, the Polarization of Skylight, and on the Polarization of Light by Cloudy Matter Generally JF - Proceedings of the Royal Society of London (1854-1905) VL - 17 SP - 223 EP - 233 PY - 1868/01/01/ UR - http://dx.doi.org/10.1098/rspl.1868.0033 M3 - doi:10.1098/rspl.1868.0033 AU - Tyndall, J. ER -