TY - JOUR T1 - The Radio-Micrometer JF - Philosophical Transactions of the Royal Society of London. A (1887-1895) VL - 180 SP - 159 EP - 186 PY - 1889/01/01/ UR - http://dx.doi.org/10.1098/rsta.1889.0005 M3 - doi:10.1098/rsta.1889.0005 AU - Boys, C. ER -