"Let it them be put into any clean oven vessel of china or stoneware which should be wider at the top than at the bottom. so that there may be the largest surface above to favor the evaporation"

This quote by James Lind is describing the process of vaporizing a liquid. He is recommending that the liquid needs to be put into a tidy oven vessel made from either china or stoneware. The vessel ought to be larger at the top than at the bottom, so that the area of the liquid is increased. This will enable more effective evaporation, as the larger area will allow more of the liquid to be exposed to the air. By increasing the area, the evaporation process will be sped up, as more of the liquid will be able to vaporize simultaneously. This quote is a suggestion that the shape of the vessel used to vaporize a liquid can have a significant impact on the speed of the procedure.