The practical gager, or, the young gager's assistant : containing all the necessary rules for gaging and fixing the utensils of victuallers, common brewers, distillers, and maltsters : also a table of the duties, allowances, bounties, and drawbacks of excise, distinguishing the several acts of Parliament by which they have been respectively granted, besides various other useful tables for computing the said duties, &c. : with an appendix containing the method of gaging by the callipers, as practised in the Port of London, and all the out-ports, the rewards now payable for seized spirits, and some specimens of vouchers adapted for the use of collectors, supervisors, officers, and clerks of the excise and customs, as well as for maltsters, distillers, common brewers, victuallers, &c. &c. / by William Symons.