In days gone by when iron worked in contact with iron on the faces of rollers the colour of the outturn (that is the infused Tea leaves) was quite destroyed. That is now remedied, but there is still an evil of less importance. The wood on the said faces of the rollers absorbs the sap of the leaf, and unless they are washed very clean, the said old sap is apt to contaminate, more or less, the new leaf. Could not this be rectified by making the faces of the rollers of porcelain or iron (like camp crockery) and the drums of opaque coarse glass? Both these, if they would stand, could easily be washed quite clean. I give the idea, given to me, for what it is worth, and would invite the opinion of other planters on it. EDWARD MONEY. Darjeeling, _November 10th, 1880_. _Fermenting_ is the next process in the list. After the leaf is rolled it is put together; some make it up in truncated balls, some put it in baskets, but in either case it is allowed to stand until a given amount of fermentation has set in. This is done in the warm atmosphere of the factory. Naturally no machine is required for this process; but shelves, at varying height from the factory floor, are useful to regulate the fermentation, inasmuch as the higher the shelf the warmer the air, and warmth hastens the process. This plan of shelves was devised by Mr. J. Fleming, at the Phoolbarry Garden, and it seemed to me to answer well. _Drying_ or _Firing_ comes next. Up to this point the leaf is of a brownish green colour, and soft. After the drying it is black and crisp, in fact, made Tea. By the drying process all the moisture in the mass is driven off. For many years charcoal only was used to fire Tea, and it was an established belief that _the fumes_ given out by the said charcoal had some chemical effect on the Tea--in fact, that good Tea could not be made without it. When, twelve years ago, I published the First Edition of this Essay, I had begun to doubt the soundness of the above belief, and four years later I had thoroughly satisfied myself of its fallacy. It was not, however, till 1877-78 that I devised _a means_ of firing Teas without charcoal. The invention was well received, and thought well of. At all events, it _proved_ what I had long urged--viz., that any fuel, if contact with the smoke was avoided, would dry Tea. My invention was a very crude one, and quickly superseded by far more perfect designs; still I have the satisfaction of knowing that on this head I have done much to perfect Tea manufacture, and that the conviction I had attained to in 1874 is now general and practised throughout India. (Pages 119-121, 295, to end of Addenda, bear out the above remarks.) I will now consider the various _Tea-Drying Machines_.