TY - JOUR T1 - Some Temperature Refraction Coefficients of Optical Glass JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 91 IS - 629 SP - 319 EP - 321 PY - 1915/05/03/ UR - http://dx.doi.org/10.1098/rspa.1915.0022 M3 - doi:10.1098/rspa.1915.0022 AU - Gifford, J. ER -