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Lime in this country is derived from the calcium carbonate limestones and chalks which shape the landscapes of southern England and the Midlands. Lime is the endproduct of a two-stage process which involves heating limestone to over 900°C to drive off chemically combined carbon dioxide, leaving behind calcium oxide - quicklime. Adding water causes a violent reaction as the oxide combines to form calcium hydroxide - lime. W.J. Allan and L.A. McDonald
While good structural design and site experience are prerequisites for success at the Part 3 examination of the Institution, there can be little doubt that attendance at a suitable preparatory course is of considerable help to candidates in improving their prospects of passing. Such courses are available in most branch areas throughout the country, frequently organised with the support and participation of local branch members. For some years members of the North Thames Branch have been actively involved in passing on their structural engineering knowhow to candidates preparing for the Part 3 examination. C. Davies
The speed with which memory fades is a fact of life that never ceases to surprise me. What follows is therefore a recollection that may or may not be wholly accurate! It now seems as though the Institution has always been constituted in its present form, but it is less than 9 years since a Development Plan was published (The Structural Engineer, June 1984) which fundamentally altered the form of the Institution. J.A. Waller