The product would be darker in colour than (_a_) and slightly better than (_b_). Let it be granted that there might be a monetary loss on (_a_), it is probable that there would be a slight gain in comparison with the usual prices obtained for (_b_) and (_c_). Now, as a general rule, the actual percentage of crop made into (_b_) is appreciably less than that made into (_c_) and still less than (_b_) and (_c_) together. Apparently, therefore, there would be a margin of profit on the whole by making a compound crepe. It may be pointed out, on the other hand, that there might be expended on the manufacture of this crepe more time and labour, but as against this the labour of sorting and grading would be simplified. Unfortunately this process is not open to estates which do not possess a scrap-washer. _It is essential that the rubber should be free from grit, sand, and bark particles._ In the absence of a scrap-washer for the cleansing of the bark-shavings, it would be futile to attempt to make a compound crepe containing that type of rubber, as one would run the risk of spoiling the whole. It seems certain that in course of time a scrap-washer will be considered as necessary a piece of machinery as an ordinary crepeing machine in the factories of estates having sufficient means. Until that time the preparation of compound crepes must be the privilege only of well-equipped estates, unless other estates can send their lower grade rubbers for treatment in a scrap-washer to their more fortunate neighbours. In previous publications a diminution in the number of grades of crepe rubber has been advocated, and it is gratifying to find that in many cases the amending grades suggested have been improved upon. Many estates now make only three grades of crepe--viz.: (_a_) No. 1. From latex coagulated in the store. (_b_) No. 2. Compound. (_c_) No. 3. Earth-rubber. It will be seen that the compound crepe includes all types between fine pale crepe and earth-rubber. Naturally one could not safely recommend the inclusion of earth-rubber in any compound crepe, as the risk of possible "tackiness" in the whole would be serious. In the case of the bark-shavings rubber to be incorporated, it is first cleaned alone in the scrap-washer. Then all types are mixed together again in the scrap-washer in proportions ruled by the experience of the usual average percentages of each grade of the crop. Besides the estates having only three grades, there are others which make four--viz.: (_a_) No. 1. From latex coagulated in the store. (_b_) No. 2. Compound, from cup washings, etc., skimmings, and naturally coagulated lump. (_c_) No. 3. Compound, from tree-scrap and bark-shavings rubber. (_d_) No. 4. Earth-scrap. Other variations are possible, but their number is limited, and they all conduce to simplification of working, and a supply to the market of rubber having greater uniformity.