Determination of particle size distribution using the lightextinction method X.-S. Cai and N. N. Wang 153
Bed expansion and the visible bubble flow rate in gas fluidizedbeds J. Baeyens and S. Y. Wu 163
`Turbo Powsizer': the performance of an on-line particle sizemeasuring instrument newly developed for finished cement mills T.Ikemoto and K. Watanabe 191
The influence of granule morphology on attrition duringfluidization and pneumatic transport E. Coppinger, L. Discepola, G. I.Tardos and G. Bellamy 201
Fine silicon powder synthesis by the laser induced reaction S.Endoh and K. Takeuchi 219
Study of Redlich--Kwong and Virial equations in the case ofbidimensional films T. Hamieh 227