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From the single, small and ill-reported, included study, the hostel ward type of facility appeared cheaper and positively effective. Currently, the value of this way of supporting people - which could be considerable - is unclear. Trials are needed. Any 24 hour care 'ward-in-a-house' is likely to be oversubscribed. We argue that the only equitable way of providing care in this way is to draw lots as to who is allocated a place from the eligible group of people with serious mental illness. With follow-up of all eligible for the placements - those who were lucky enough to be allocated a place as well as people in more standard type of care - real-world evaluation could take place. In the UK further randomised control trials are probably impossible, as many of these types of facilities have closed. The broader lesson of this review is to ensure early and rigorous evaluation of fashionable innovations before they are superseded by new approaches.

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Software application or development in optical image digital data processing requires a fast, good quality, yet inexpensive hard copy of processed images. To achieve this, a Cambo camera with an f 2.8/150-mm Xenotar lens in a Copal shutter having a Graflok back for 4 x 5 Polaroid type 57 pack-film has been interfaced to an existing Adage, AGT-30/Electro-Mechanical, EMR 6050 graphic computer system. Time-lapse photography in conjunction with a log to linear voltage transformation has resulted in an interactive system capable of producing a hard copy in 54 sec (Fig. 1). The interactive aspect of the system lies in a Tektronix 4002 graphic computer terminal and its associated hard copy unit (Fig. 2).

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