The weight of all kinds of commodities and goods is usually calculated by gross weighty suttle, and net weight.
It is called gross when taken without any deduction for tare, draft, or tret; suttle, when the tare has been deducted, except when tret is allowed; net (also nett) when clear of all deduction or allowance for tare, draft, tret, and the like.
The price of goods is usually calculated, of course, on their net weight.
Packed; hence the word is also used as meaning the allowance or abatement made on that account on the weight of goods sold in packages.
Draft is an allowance or deduction often made on the gross weight of goods in consideration of their being damp or mixed with dust, rubbish, or other extraneous substance.
Treat is an old customary allowance of four pounds on every 104 pounds of the settle weight of certain commodities as compensation to the buyer for wear, damage, or deterioration in transit or for the dust or sand mixed with any commodity. The use is almost obsolete now, but still maintained on some markets.
Tare is calculated in trade in five different ways, viz.:
(a) By particular or real tare, which is found by actually ascertaining the weight of the boxes, vessels, sacks, etc., wherein goods are packed, and deducting it from the gross weight of the parcel.
(b) By average tare, viz., the tare on a lot of goods, calculated by taking as an average the real tare duly ascertained of a few packages, out of the whole number of which the parcel is composed.
(c) By customary tare, which is a steady allowance m the gross weight of certain goods, fixed by the custom of each particular trade?
(d) By computed tare, being an estimated allowance agreed upon at the time of sale.
(e) By super tare, by granting an additional allowance when packages exceed a certain amount.