TY  - JOUR
T1  - On a Fourth State of Matter
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 30
SP  - 469
EP  - 472
PY  - 1879/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1879.0147
M3  - doi:10.1098/rspl.1879.0147
AU  - Crookes, W.
ER  -