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Coal-dealer's companion : being tables most exactly calculated for the ready and easy finding out the true value of any number of chaldrons, and vatts of coals, from 1 chaldron to 500, at any of the usual prices, from l. 13 (encreasing 5s. per score) to 40l. per score, with 8d. per chaldron, meteage money included, and may serve for any higher price if there should be occasion, by following the directions in the preface : first compos'd by George Oldner and since carefully revis'd and enlarg'd : to which is added, an appendix, of great use, shewing how (by the help of new tables) to compute the value of any quantity of coals, at any price whatsoever, speedily, by multiplication only.
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