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ABSTRACTS AND REVIEWS 279 B. Ignition of Fires Chandler, S. E . (Joint Fire Research Organization, Boreham Wood, England) "The Igmtion of Plastic Materials in Dwellmgs," Joint Fire Research Organiza- iion Fire Research Note No. 883 (July 1971) Section: B Subjects: Ignition of Plastics, Fire statistics Author's Summary An analysis has been made of the statistics of mcidents involving the ignition of plastics m dwellmgs. The estimated number of incidents m 1969 (based on a 1 in 2 sample of reports) was 396 This total does not include fires in which plastics were not the materials igmted first or fires involving woven fabrics. One hundred and sixty eight mcidents occurred in kitchens, 54 in living rooms and 52 m bed- rooms. The items most frequently ignited were bowls, buckets, containers, furm- ture, toys and games In only 12 mcidents were structural materials (e g walls and ceilings) Igmted Coolang appliances provided the source of igmtion in 100 inci- dents, and space heaters m 80. In the 1 in 2 sample of reports, seven incidents involved rescues and casualties (7 non-fatal, 5 fatal). Al l but one of these occurred in the bedroom C. Detection of Fires G'Dogherty, M. J . , Young, R, A. and Lange, A, (Fire Research Station, Boreham Wood, England) "Detection of Fires m Cable Tunnels," Electrical Review (February 26, 1971) Section: C Subjects: Fure detectors, Spacings of detectors Abstracted by G, Fristrom Experiments were conducted to investigate positionmg of smoke and heat de- tectors m cable tunnels and subways. Response times of both detectors at various spacmgs to a pan fire of 0.37 m^ with and without forced ventilation were com- pared The heat detector system spaced at 3.7 meters gave a maximum detection time of 30 seconds to 1 minute 12 seconds without forced ventilation while an ionization chamber smoke detector at 10 meters spacmgs required 31 seconds response time. With forced ventilation these times are reduced to 40 and 40 seconds
