TY - JOUR T1 - On the Analysis of $ \alpha $-Ray Photographs JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 102 IS - 716 SP - 294 EP - 318 PY - 1922/12/01/ UR - http://dx.doi.org/10.1098/rspa.1922.0087 M3 - doi:10.1098/rspa.1922.0087 AU - Blackett, P. ER -