(3) A streaked and dull rubber prepared from naturally-coagulated clots found in cups, buckets, and latex carts. (4) A streaked rubber prepared from scrap which had coagulated upon the face of the cut bark. (5) A brownish and streaked rubber made by maceration of bark-shavings to which pieces of tree-scrap adhered. (6) A dark rubber, often tacky, prepared from scrap found in or on the ground near the base of the trees. As it is often a matter of weeks between any two regular collections, it is easy to understand why the dry rubber was more liable to be "tacky" than any other grade of crepe. It will have been evident to all who have acquaintance with these grades, as shipped from many different estates, that the diversity in the various shipments must have been rather bewildering. There appeared to be a regrettable lack of uniformity, even in the appearance of, say, a bark scrap rubber from any two estates. When, in addition to these variations, the further complication of condition of cleanliness is introduced, one may realise the difficulty attaching to the evaluation of these rubbers as they appeared upon the market. Although the foregoing paragraph is written in the past tense, it should be pointed out that within certain limits the trouble continues to exist with respect to the output of a great number of estates. In the case of many, it has been realised that the manufacturer does not want to buy a large number of "parcels," all differing in some respect. It is probably correct to state that what a manufacturer requires is a big "parcel" uniform in appearance and treatment, even though the colour may not be so light as that of many smaller lots. This statement is modified with the proviso that the rubber, no matter what its colour or appearance may be, must be free from dirt, grit, and bark. The difficulty of making a uniform product from several types of lower grade rubbers has been successfully solved on several estates by the preparation of a "compound" crepe composed of a mixture of the best lower grades in approximately definite proportions daily. Naturally the shade of colour of this compound crepe will depend largely upon the types of rubber employed, but as a rule it is somewhat darker than the highest of the types employed in the mixture. To the writers this seems immaterial as long as the manufacturer is offered a larger and more uniform lot which can be given uniform treatment in vulcanisation processes. Neither would it appear that the seller suffers any monetary loss. In point of fact it will be found probably that the reverse is the case. For instance, supposing it were decided to mix for a compound crepe-- (_a_) Naturally coagulated lump rubber. (_b_) Tree-scrap. (_c_) Bark-shavings scrap.