1. BS 1724:1990. Specification for Bronze welding by gas

2. BS 1726-1:2010. Cylindrical helical springs made from round wire and bar - Guide to methods of specifying and tolerancing hot coiled springs, and cold coiled springs not covered by BS EN 15800, and general spring testing

3. BS 1726-2:2002. Cylindrical helical springs made from round wire and bar - Guide to methods of specifying, tolerances and testing - Part 2: Extension springs

4. BS 1726-3:2002. Cylindrical helical springs made from round wire and bar - Guide to methods of specifying, tolerances and testing - Part 3: Torsion springs

5. BS 1734:1951. Specification for Micrometer heads

6. BS 1747-11:1993 ISO 9835:1993. Methods for Measurement of air pollution - Part 11: Determination of a black smoke index in ambient air

7. BS 1747-12:1993 ISO 10313:1993. Methods for Measurement of air pollution - Part 12: Determination of the mass concentration of ozone in ambient air chemiluminescence method

8. BS 1747-13:1994 ISO 9855:1993. Methods for Measurement of air pollution - Part 13: Determination of the particulate lead content of aerosols collected on filters atomic absorption spectrometric method

9. BS 1747-6:1983 ISO 4219:1979. Methods for Measurement of air pollution - Part 6: Sampling equipment used for the determination of gaseous sulphur compounds in ambient air

10. BS 1747-9:1987 ISO 7996:1985. Methods for Measurement of air pollution - Part 9: Determination of the mass concentration of nitrogen oxides in ambient air chemiluminescence method