Metric Weights and Measures Act 1864
WHEREAS, for the Promotion and Extension of our internal as well as our foreign Trade, and for the Advancement of Science, it is expedient to legalize the Use of the Metric System of Weights and Measures: Be it enacted by the Queen's most Excellent Majesty, by and with the Advice and Consent of the Lords Spiritual and Temporal, and Commons, in this present Parliament assembled, and by the Authority of the same, as follows: