DF. D. c;ispar,

IuI4wHAm ll,
ccm.neoticut,

Sloanta Physics Laboratory,
Yale Wversi ty,

I3,S.A.

Birkbwk College Crystallography Lab.,

2l To~~ington Square,

London, W.C.1.

f have cetlcrulsrted FCWI~P projections from

ths equatorlaf, data, in very moh the Sam way as you (using
the theoretical shape of the central peak) and I fir,d a
heavy dansiey shell at about r ID 55A.
mnts are undoubtedly less accurate than yours, but thgy
extend to much lar er angles, which snabled ma to caleuldx

I2nifom TOd.

My intensity measzre-

a complat@ pro,$ect !f on rather than its dfffererce from a

Z  at^ at  resent busy writing up this and

other aspects of the ,o&, and hope tr0 be able to send you
a copy of a draft paper I.n 8 week or ba.