The practical gager: or, The young gager's assistant : Containing those things which are actually practised, and which are absolutely necessary to be known and understood by every person that is employed as a gager or officer in the revenue of excise. To which are added, all the necessary tables for gaging and sixing the utensils of victuallers, common brewers, and distillers: also for moneying the several sorts of goods, or for finding the amounts of the charges. Very useful for supervisors, officers, and collectors clerks. The fifth edition. With an appendix; containing several additions, viz. The method of gaging by equidistant ordinates; inching and tabulating of those cases and specimens of vouchers and abstracts for the several duties. Dedicated (by permission) to the Honourable Commissioners of Excise. By William Symons, collector of excise.