Note 633 — VII AN ANALYSIS OF COST
Reading edition
The average weight of letter packets not exceeding 1 ounce is 0.357 ounce. The average weight of all letter packets is 0.747 ounce. In the case of packets between 1 ounce and 2 ounces the average weight is assumed to be 1.4 ounces; and 2.6 ounces in the case of those between 2 ounces and 4 ounces.
Of ordinary letter packets, 86.34 per cent. do not exceed 1 ounce in weight, 5.25 per cent. are between 1 ounce and 2 ounces, and 4.53 per cent. are between 2 ounces and 4 ounces in weight.
The average weight of a postcard is 0.142 ounce, of a halfpenny packet 0.498 ounce, and of a newspaper packet 4.264 ounces (97.57 per cent. containing only one newspaper, average weight 4.159 ounces; 2.43 per cent. containing two or more newspapers, average weight 8.461 ounces).