TY - JOUR T1 - An Experiment in Search of a Directive Action of One Quartz Crystal on Another. JF - Proceedings of the Royal Society of London (1854-1905) VL - 64 SP - 121 EP - 122 PY - 1898/01/01/ UR - http://dx.doi.org/10.1098/rspl.1898.0076 M3 - doi:10.1098/rspl.1898.0076 AU - Poynting, J. AU - Gray, P. ER -