TY - JOUR T1 - A Wave-Length Comparator for Standards of Length JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 83 IS - 559 SP - 79 EP - 80 PY - 1909/11/03/ UR - http://dx.doi.org/10.1098/rspa.1909.0078 M3 - doi:10.1098/rspa.1909.0078 AU - Tutton, A. ER -