To each seringueiro is allotted two or three estradas, each with 120 to 200 trees. For this he pays 15 per cent of his gathering of fine rubber to the owner of the forest and an additional 10 per cent if he uses the mules for transportation. The remaining rubber belongs to the seringueiro in so far as he does not have to pay it for goods purchased. As a rule, the owner purchases a portion of the product on the spot at a price that is, of course, somewhat lower than is paid in Manáos, the remaining portion is shipped, for account of the seringueiro, to Pará and Manáos, and he receives the full market price for it, of course, after deducting freight and duties. The balance is placed to the credit of the seringueiro and paid to the firm representing the owner in Manáos or Pará. Certain items, for instance, the price of Sernamby, consisting of residual scraps of rubber, the seringueiro also receives in Acre. In some cases payments are made in rubber products, a form of payment quite common in other transactions. On the upper Acre, a seringueiro will usually collect in a day as much milk as will yield from 6 to 15 kilos of fine rubber. Two liters of this milk yield a kilo of dry rubber, whereas with Manihot Glaziovi, 3 liters are required for this. Exceptional cases occur where the seringueiro furnishes milk for 20 to 25 kilos of fine rubber in one day. Daily collections of more than 40 liters, however, a single worker can hardly control and he must then have an assistant for carrying and smoking. The yearly production of a seringueiro amounts, in the better rubber forest properties, to upwards of 1,000 kilos of dry rubber. [Illustration: RUBBER TREE OF NEARLY FIVE METERS IN CIRCUMFERENCE.] Some owners offer a reward, such as for instance, a gold watch, for the most industrious and luckiest seringueiro. On the Seringal S. Francisco, for the crop year 1911-1912, a seringueiro won the gold watch who had collected 2,500 kilos. The annual highest yield of caoutchouc from the Castillôa was only 1,700 kilos, for the forest there in regard to Castillôa is already very much exhausted. Otherwise the yields of this rubber are more variable and higher than those of fine rubber. If the price of rubber rules high, a seringueiro has quite a considerable income and with a little frugality can acquire a property. If, on the other hand, the price of rubber drops below five milreis, the seringueiro has trouble to make both ends meet with his income and easily gets into debt. The supplies that he must purchase from the proprietor or his representative (lessee) are very expensive. The customs duties, the long haul and consequently high freight, the risk, the different losses, which the proprietor suffers through debtor workmen, and the occasional high price of fine rubber, which forces all prices upward, makes everything in upper Acre very dear. The prices of some of the most necessary supplies and goods are about as follows.