TY - JOUR T1 - Sixth Memoir on Radiation and Absorption. Influence of Colour and Mechanical Condition on Radiant Heat JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 156 SP - 83 EP - 96 PY - 1866/01/01/ UR - http://dx.doi.org/10.1098/rstl.1866.0005 M3 - doi:10.1098/rstl.1866.0005 AU - Tyndall, J. ER -