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1. Since 1935-in what time I could spare from other things-my thoughts have been directed to one main objective : I have been seeking to extend the range and power of a new technique of numerical computation. It has been, for me, a rather thrilling experience, for in that time, with a small but enthusiastic team, I have gone for harder and yet harder problems without (as yet) meeting any that defied attack. At all times we have been fully extended by our current problem, but looking back on problems solved six months before we have seen them as quite easy though at times laborious. Indeed, the end is now in sight of problems known to me when we started, and still no quite insuperable barrier is apparent. We seem to have found a tool of general utility, and now it seems that what I have to do is different : to interest others in a line of thought which they may find of use, applied to problems that are outside our range of knowledge.
Richard V. Southwell
Mr. B. Rhodes: Mr. Longbottom has done less than justice to large diameter strand, by which I mean 28 mm (1 1/8 in) diameter strand. I know it is not used a lot, but this is really because of lack of effort on the part of the manufacturers and the system suppliers. 28 mm diameter strand has certain basic drawbacks, namely:
1. The shape of the load/extension curve
2. Relaxation losses at 6 per cent
3. Lower grip efficiencies
4. The tendency to fly open when cut
5. The 'banana' effect at the ends
Mr. J. E. C. Farebrother (F) : I have been asked to open this discussion in my capacity as Chairman of the Steering Committee of the LUCID organization. Len Jones has thanked almost everybody except himself and I would like to do that on behalf of the LUCID members.