OBITUARY Edward Dempsey, BSc, PhD It is with great sadness that we r e p o r t the s u d d e n death o f E d w a r d (Ted) Dempsey on 25 July 1991. T e d g r a d u a t e d in 1952 with first class h o n o r s in natural philosophy and in 1955 with a PhD in theoretical physics f r o m St. Andrews University. H e spent the next five years at the Atomic Weapons Research Establishment, Aldermaston, b e f o r e taking u p a post at Uhion Carbide Research Institute, T a r r y t o w n , NY, USA, as a research physicist in 1960. In 1964 he j o i n e d the Mobil R&D C o r p o r a t i o n in their Princeton Laboratories, NJ, USA, as a senior research scientist to work on zeolite catalysts. H e rapidly progressed until, in 1968, he became head o f the Physics section. About this time he began publishing papers that are still r e g a r d e d as classics in their field and still q u o t e d frequently in the zeolite literature. T h e s e papers, in collaboration with D.H. Olson, G.H. Kuehl and G.T. Kerr, predicted that the distribution o f Si and Al atoms in zeolites X and Y is o r d e r e d and described the n a t u r e o f this distribution as a function o f Si/A1 ratio. T h e s e predictions were c o n f i r m e d in 1980 by M A S n.m.r.
In 1970 T e d and his family r e t u r n e d to the U K and in 1971 he j o i n e d the Ministry o f Defence. F r o m then until his early r e t i r e m e n t in 1991 he was involved in the d e v e l o p m e n t o f c o m p u t e r models for the British Army. T e d always maintained a great interest in zeolites d u r i n g his twenty years at the MOD. H e was a consultant for L a p o r t e Industries for many years and a t t e n d e d m a n y BZA- and IZA-sponsored conferences. O n his r e t i r e m e n t f r o m the MOD he expressed a strong desire to start up some theoretical studies on zeolites at Imperial College. I was delighted to invite him to join my g r o u p . It was a great shock and very sad loss to zeolite research when he suddenly died o f a heart attack just as these a r r a n g e m e n t s had been finalized. T h e whole o f the Zeolite fraternity send their condolences to his wife, Aileen, and his son and daughter.
Lovat V.C. Rees
CALENDAR This calendar of forthcoming events is based on information provided by the respective organizers and secondary sources. Zeolites welcomes information on meetings suitable for listing in this section. Copy deadlines are four months ahead of cover dates. Date 1992
Second International Workshop on Fourier Transform Infrared Spectroscopy
Mrs. M. Stalmans, University of Antwerp (UIA), Dept. of Chemistry, Universiteitsplein I, B-2610 AntwerpWilrijk, Belgium
Fourth International Conference on Fundamentals of Adsorption
Prof. M. Suzuki, Institute of Industrial Science, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo 106, Japan
New methods for modelling processes within solids and at their surfaces
The Scientific Meeting Secretary, The Royal Society, 6 Carlton House Terrace, London SW1Y 5AG, UK
Sixth International Symposium on Magnetic Resonance in Colloid and Interface Science
Prof. Giacomo Martini, Chairman, 6th ISMRCIS, Dept. of Chemistry, University of Florence, Via G. Capponi 9, 50121 Firenze, Italy
9th International Zeolite Conference
Dr. D.E.W. Vaughan, Exxon R&E Co., Clinton Twp., Rte. 22 East, Annandale, NJ 088O 1, USA
444 ZEOLITES, 1992, Vol 12, April~May