# The Smoke Control Areas (Authorised Fuels) (Scotland) Regulations 1988, Paragraph 3


Centurion briquettes manufactured by the Cadzow Coal Co. Ltd. at Hamilton, Lanarkshire which—
(1) comprise anthracite (as to approximately 90 per cent of total weight) and molasses and phosphoric acid (as to the remaining weight),
(2) after conversion into briquettes by roll-press have been subjected to heat treatment at about 250C,
(3) are unmarked ovoids with an average weight of 35 grammes, and
(4) have a sulphur content not exceeding 1.5 per cent of total weight.

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Source: https://www.legislation.gov.uk/uksi/1988/1270/schedule/paragraph/3 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-scotland-regulations-1988/schedule/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.