Make small holes in different parts of the branch and by the 

 dripping and running of the milk it is easily seen where to place 

 the cups, then by means of a piece of string (perhaps it woul d be 

 better to use zinc wire) hang the cups in such a way that they 

 will be close up to the branch (when necessary) making a small 

 cut in the bark so as to immerge the side of the small cup in such 

 a manner that the greater part of the bark covers it, then make 

 above the cup different furrows (the less the better) in such a 

 manner that the milk will converge well thereinto. Cutting the 

 tree unnecessarily should be avoided as it spoils the tree without 

 giving any result. 



In the Manicoba (be it the root or branches) the smaller the 

 orifice made in the bark the greater the production of milk, great 

 care must be taken not to damage the wood. 



Other methods employed to improve on the three descriptions 

 given. 



First Process : The use of water as a coagulator. In either of 

 the processes fill the basins with water which will coagulate the 

 milk in such a manner that sand and heavy substances will 

 remain at the bottom of the vessel, and the light ones will float 

 without adhering to the rubber, so that coagulating in the water 

 it becomes separated from foreign bodies. 



Rubber coagulated in water presents a splendid colour becom- 

 ing pure and fresh, separating itself from that which gives the 

 water a milky colour. 



In spite of these good qualities we notice that the rubber con- 

 tinues to ferment, losing its fine natural colour, becoming dark 

 and acquiring an unpleasant smell which obliges us to neu- 

 tralize the fermentation, and preserving its qualities. 



Second Process : In place of pure water use a solution of alum 

 and with it fill the basins. 



In our experience, we made a solution of alum in a glass vessel 

 and scratching the tree we allowed the milk to fall drop by drop 

 into the solution, on coming in contact with the solution it coagu- 

 lated rapidly. Making the same effect as the drippings from a 

 candle would make upon water, without changing its natural 

 colour, producing a greater quantity of coagulation, and giving a 

 rubber of the best quality and of orange colour. 



Third Process : We also used chloride of soda (kitchen salt) 

 making a weak solution, and as in the second process we allowed 

 the milk to fall drop by drop, this time instead of coagulating it 

 remained fluid, notwithstanding that the percentage of milk had 

 been raised. Eventually it coagulated after a long time had 

 elapsed, producing an excellent rubber the colour of sulphur. 



The manner of adopting these two processes. Having to adopt 

 either of these two processes you proceed as follows : — 



Make a solution (if alum, sufficient to make a weak solution, if 

 salt it should be saturated) with which the basins or troughs 

 must be filled to receive the milk as in the other processes. 



