Summary: IT is not so many years ago that building was one of the most traditional of our industries, its methods and materials having been handed down from generation to generation and being in many instances peculiar to their special localities. That this state of affairs no longer exists, and that the very varied assortment of trades now occupied in building have indeed ‘put their house in order’, is made evident by even the briefest of tours of the Building Trades Exhibition, which is being held at Olympia on September 12-26.