The author's rationale for Imperial units may get her drummed out of the BWMA. :) http://www.theaustralian.com.au/news/arts/pottered-history-goes-online-as-jk-rowling-tells-all/story-e6frg8n6-1226116257360 Rowling explains that she insisted on using imperial weights and measures rather than metric because she thought they were more quirky and thus more suited to wizards than the cold logic of the metric system. She subsequently accepted membership of the British Weights and Measures Association, not because she is opposed to metric, as has been assumed, but as a way of irritating her sister. "Di is never funnier than when infuriated, and among her many pet hates is the old-bufferish adherence to the old ways just for the sake of them."
