Distance. For each kg. after the first 5 kg. Zone I Not exceeding 10 miles 1/2 sgr. (5 pf.) " II From 10-20 miles 1 " " III " 20-50 " 2 " " IV " 50-100 " 3 " " V " 100-150 " 4 " " VI Over 150 " 5 " For cumbrous and unwieldy parcels an additional charge not exceeding 50 per cent. of the ordinary postage might be made. With the increase of traffic it was found impossible to forward all the parcels by the postal trains, and the Post Office was only permitted to send a limited quantity of parcels by the ordinary express trains.[450] In 1880 it was arranged that parcels which must be delivered without delay--e.g. those containing fish or flowers--should be forwarded by express train on payment of a special fee of 1 Mark each. In 1886 this additional fee was made applicable to all urgent parcels, whatever the contents. The tariff of 1873 has proved too high both for heavy and for very light parcels, and some curious anomalies result from the combination of zone rates and uniform rates. A parcel of 5 kilogrammes sent for any distance greater than 10 miles costs 50 pf. Eight parcels of 5 kilogrammes each could, therefore, for 4 Marks be sent for any distance; but if made up into one parcel of 40 kilogrammes the postage would be 7 Marks 50 for places in the third zone (20 to 50 miles), and for places in the sixth zone (over 150 miles) no less than 18 Marks.[451] It is therefore to the advantage of the public to divide a heavy parcel, though such a proceeding obviously increases the cost to the administration of its handling and transmission. The despatch of heavy parcels by post is naturally discouraged, and the proportion of such parcels is decreasing.[452] Of the total number of parcels sent by post in 1900, more than 88 per cent. were less than 5 kilogrammes in weight, and the number of greater weight than 10 kilogrammes formed less than 3 per cent. The average amount of postage per parcel on parcels falling in Zones III, IV, V, and VI is not appreciably greater than that on parcels falling in Zone II.[453] The number of heavy parcels in the higher zones is, therefore, negligible,[454] and is least in the highest zones.[455]