“In those kilns especially, when bags are used, there is no passage of air through the middle of the kiln; and a vapour, in spite of all the care that can be taken, will either transpire through the bags, or be reflected from the crown, which will smoke and spoil our ware, though it doth not appear to affect other compositions. How true this remark may be, with regard to the St. Stephen’s materials I cannot determine, as they have not yet been tried in a kiln. The only furnace or kiln which we have tried with any degree of success, is the kiln used by the potters who make brown stone. It is called the 36-hole kiln. Wood is the fuel used in it. They burn billets before and under it, where there is an oven or arch pierced by 36-holes, through which the flame ascends into the chamber which contains the ware, and goes out at as many holes of the same dimensions in the crown of the furnace. The safeguards at bottom stand on knobs of clay, which won’t melt, about two inches square, and two inches and a half or three inches high; by which means more of the holes are stopped by the bottoms of the safeguard, but the air and flame freely ascend, and play round every safeguard; by which means those tingeing vapours, which have given us so much trouble, are kept in continual motion upward, and hindered from penetrating and staining the ware. “Experience must determine the best form and way of using this kiln. ’Tis the only desideratum wanting to the bringing of the manufacture of porcelain, equal to any in the world, to perfection in England. “Caulin pipeclay and a coarse unvitrifiable sand make excellent safeguards.” The experiments on the Cornish materials having been perfectly successful, Cookworthy established himself as a china manufacturer at Plymouth. The works were at Coxside, at the extreme angle which juts into the water at Sutton Pool. Some parts of the buildings still exist, and are used as a shipwright’s yard. They are still known by the name of the “China House,” and it is really pleasant to find that a memory of these once celebrated works is yet retained on the spot where they were carried on. It is strange, however, to think that the same building which was used for the fabricating of the finest and most delicate and fragile articles, should now be used for the constructing of huge seaworthy vessels, which can withstand the force of the waves, and bear heavy burthens in safety across the seas, whether in calm or storm.