TY  - JOUR
T1  - A Reciprocating Expansion Apparatus for Detecting Ionising Rays
JF  - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934)
VL  - 99
IS  - 700
SP  - 425
EP  - 431
PY  - 1921/08/02/
UR  - http://dx.doi.org/10.1098/rspa.1921.0055
M3  - doi:10.1098/rspa.1921.0055
AU  - Shimizu, T.
ER  -