TY - JOUR T1 - On the Composition of Zeolite JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 101 SP - 171 EP - 177 PY - 1811/01/01/ UR - http://dx.doi.org/10.1098/rstl.1811.0010 M3 - doi:10.1098/rstl.1811.0010 AU - Smithson, J. ER -