5th Course: Erice : 27 March to 9 April 1978
Director : Giuseppe Allegra, Milan
Lectures Lecturers
Probability Distribution of Structure Factors G. Allegra,
Polytechnic, Milan, I
Origin Fixing G.T. De Titta, Medical Research Foundation, Buffalo,
USA
Symbolic Addition C. Giacovazzo, Università di Bari, I 
Multisolution Methods H. Hauptman, Medical Research Foundation, Buffalo,
USA
Phase Refinement and Extension Techniques I.L. Karle, Naval Research
Laboratory, Washington, USA
Multiple Phase Relationships J. Karle, Naval Research Laboratory,
Washington, USA
Theory of Cosine Invariants P. Main, University of York, UK
Theory of Inequalities R. Norrestam, Technical University Lingby,
DK
Relationships between Relationships D. Sayre, IBM Research Laboratories,
Yorktown Heights, USA
Matrix Methods H. Schenk, University of Amsterdam, NL
The Theory of Inequalities G.M. Sheldrick, University of Cambridge,
UK
Use of Chemical Information D. Viterbo, University of Turin, I
Magic Integers M.M. Woolfson, University of York, UK
Application to Macromolecules
It is worth noticing five out of these fourteen speakers
were "students" at the Erice Direct Methods course in 1974
A serious scientific anniversary and the shock provoked
by celebrating the fifth course.
Telegrams were sent to David Harker, Medical Foundation,
Buffalo and John Kasper, General Electric, Schenectady, with the words
:
Thirty years after your pioneer work crystallographers at Direct
Methods School Erice Sicily send their sincere greetings
Due to colds and coughings gathered during previous meetings, to celebrate
the fifth crystallographic event participants were donated a wool
scarf made in Erice, as a souvenir; in order to encourage them to
wear the scarf, the organizers thought to stick sheets at the walls
in Erice with a as warning "Crystallographers, protect your
neck!"
After the meeting, biophysicists came for their school and watching
those warnings still hanging at the walls, were asking themseleves
what sort of dangerous life crystallographers had been experiencing
few days earlier.

You can distinguish, on their knees, from left ???,
???, ???, ???, ???, Isabella Karle, then four ???, Lodovico; first
row standing Elizabeth Holt, Peter Main, Aris Terzis, Carmelo Giacovazzo,
Giuseppe Allegra, ???, David Sayre, Jerry Karle, ???, and on first
step, Fernando Mazza and Pinola Savalli scarcely behind Giuseppe Erich
Haedicke and scarcely behind Jerry, Paul Beurskens; two-three steps
up the stairs you see Davide Viterbo and further Paola Spadon with
Otto Jarchow just behind, one step up Henk Schenk