Tare and Tret

Tare and Tret, certain deductions usually made from the gross weight of goods. Tare is the weight of the box, cask, bag, or wrapping containing the goods; and the amount is obtained either by weighing the empty package itself, by taking an average of a few similar packages of equal size, or by mutually agreeing upon a certain proportion of the gross weight. The remainder is the net weight. Another deduction, at the rate of 4 lb. for every 104 lb., or $\backslash frac\{1\}\{25\}$th of the net weight, is then made, as an allowance for waste through dust, &c., and is called tret.