California Technical Bulletin 129, a test method for flammability of mattresses for use in public occupancies, was published in 1992 and has been used voluntarily by manufacturers and procurement officials throughout the United States. In this paper, the results of 126 tests conducted on mattresses that were submitted to the Bureau's laboratory are reviewed. The effects of cover fab rics, filling contents and fire-blocking barriers, both in innerspring and non- innerspring mattresses, are discussed. It is concluded that the technology and materials exist that allow manufacturers to build mattresses that comply with the requirements of this fire test standard.

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In 1981 the Bureau of Home Furnishings and Thermal Insulation began a study to evaluate the potential for cigarette ignition of residential upholstered furniture and to determine the percent of compliance with California's mandatory flammability regulations for materials used in upholstered furniture and the State's labeling requirements. This paper reports the results on 700 articles of upholstered furniture. The presence of labels and compliance with California's furniture flammability regulations is discussed. A summary of cigarette ignitions is given. The effect of cigarette test location, cover fabric weight, fiber content, resin backcoating and type filling material on cigarette ignition is discussed and the wide variety of material choices for cigarette ignition resistant residential upholstered furniture demonstrated.

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In 1981 the Bureau of Home Furnishings began a study to evaluate the potential for cigarette ignition of residential upholstered furniture and to determine the percent of compliance with California's mandatory flammability regulations for materials used in upholstered furniture and the State's labeling requirements. This paper reports the results on the first 450 items of furniture. The presence of labels and compliance with California's Furniture Flamma bility regulations is compared by year. A summary of cigarette ignitions and open flame/smoldering performance of filling material is given. The effect of cover fabric weight and fiber content and type filling material on cigarette igni tion is discussed and the wide variety of material choices for cigarette ignition resistant residential upholstered furniture demonstrated.

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The first X-ray structure of a pysultone ring indicates the ring is a non-aromatic 6velectron system.AROMATIC character in various systems having 4n + 2 peripheral n-electrons is of continuing interest.1 A variety of criteria have been employed as evidence for aromaticity including chemical reactivity,2 ring current,3* * diamagnetic susceptibility,K and X-ray structural e ~i d e n c e . ~~~In this paper, we report results of the first X-ray structural analysis of a pysultone ring.t These results support the conclusion that pysultones are not ar0matic.79~ Crystals of the pysultone (l)fi were grown from ethyl acetate-hexane. Precession photographs were recorded for a crystal using Mo-K, (A = 0.7107 A) radiation. The crystal was monoclinic; systematic absences along OkO (K = 2n + 1) and on h0Z (I = 2n + 1) uniquely identified the space group P2,/c. The needle axis, along which the crystal was mounted, was the non-unique axis a. Lattice

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