TY - JOUR T1 - A Description of a Microscopic Doublet JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 119 SP - 9 EP - 13 PY - 1829/01/01/ UR - http://dx.doi.org/10.1098/rstl.1829.0004 M3 - doi:10.1098/rstl.1829.0004 AU - Wollaston, W. ER -