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SUMMARYTwo test methods for measuring the heat release rate, HRR have been compared on fabric composites used for aircraft interior materials as side-wall panels. These methods are based on the principles of direct measurement of the convective and radiant heat by thermopiles using an Ohio State University (OSU) calorimeter, and oxygen consumption using a cone calorimeter. It has been observed when tested by standard procedures, cone results at 35 kW/m 2 incident heat flux do not correlate with OSU results at the same heat flux. This is because in the cone calorimeter, the sample is mounted horizontally whereas the OSU calorimetric method requires vertical sampling with exposure to a vertical radiant panel. A further difference between the two techniques is the ignition source}in the cone it is spark ignition, whereas in the OSU it is flame ignition; hence, samples in the OSU calorimeter ignite more easily compared to those in the cone under the same incident heat fluxes. However, in this paper we demonstrate that cone calorimetric exposure at 50 kW/m 2 heat flux gives similar peak heat release results as the 35 kW/m 2 heat flux of OSU calorimeter, but significantly different average and total heat release values over a 2 min period. The performance differences associated with these two techniques are also discussed. Moreover, the effects of structure, i.e. type of fibres used in warp/weft direction and design of fabric are also analysed with respect to heat release behaviour and their correlation discussed.

SYNOPSISOf 50 women charged with crimes of violence, 44% committed their offence during the paramenstruum (P < 0·02) and there was a significant lack of offences during the ovulatory and post-ovulatory phases of the menstrual cycle (P < 0·01). This association could not be accounted for by psychosocial factors. Offences were unrelated to symptoms of premenstrual tension. When considering treatment, recurrent behavioural changes rather than subjective symptoms should be looked for.

Six patients are reported in whom mental illness led to severe cold injury. The main contributory factors were cold surroundings, inactivity and neglect. The additional factor of impaired microcirculation in these patients may also be significant. In the winter of 1979 two instances of cold injury in patients with mental illness came to our attention. A search of the medical records at the Whittington Hospital revealed a further three cases over a period of 14 years. One patient was seen at the National Hospital for Nervous Diseases, Queen Square.

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