28. I distilled three Gallons of Sea-water, with the Proportion of six Ounces of Mr. _Appleby_’s Lapis Infernalis, and six Ounces of calcined Bones to 20 Gallons of Sea-water, as he directs. This Water lathered well with Soap, and boiled Peas well. 29. I distilled also some Sea-water With half an Ounce of Stone Lime to a Gallon, from the _Clee_ Hills in _Herefordshire_, which having been preserved ten Months in a Firkin, had slacked to dry Powder. This distilled Water did also lather well with Soap, and boiled Peas well; which proves that the Lime, which is a fixed Body, does not distill over with the Water. Since I made this Distillation, General _Oglethorpe_ informed me, that his Father, Sir _Theophilus_, told him, that Lime was one of the Ingredients, of what he and the rest of the Patentees, in _Charles_ the Second’s time, called the Cement, with which they made distilled Sea-water wholsome. 30. I distilled also some Sea-water with the like Proportion of powdered Chalk, which boiled Peas well, and was better tasted than the Waters distilled with Lapis Infernalis or Lime. I distilled also some Sea-water with an Ounce of Chalk to a Gallon, but found no Difference in the Taste of this, and that which had but half an Ounce of Chalk to a Gallon: So that half an Ounce of Chalk to a Gallon of Water will be sufficient; but where the Sea-water is salter, or more bituminous, more Chalk may be added if needful. 31. Dr. _Alston_ of _Edinburgh_, in the Preface to the Second Edition of his Dissertation on Quick-lime and Lime-water, says, that “the like Effect was found in distilling Sea-water with Lime, that it neither precipitated a Solution of Silver in Aqua-fortis, nor a Solution of corrosive Sublimate in Water, nor did it form a Pellicle of various Colours on its Surface, as did the Water distilled by Mr. _Appleby_’s Process.” And I find, Page 35 of my Book on this Subject, that Lime of Oyster-shells had the same good Effect, but required two Distillations; I might then use too small a Quantity of that Lime. Hence it is probable, that the Chalk, the Lime, the Lime in the Lapis Infernalis, and the Lime in Dr. _Butler_’s Soap-lees, seize on and fix not only the bittern Salt, but also the Bitumen of the Sea-water, as we learn from the like Effect in the Purification of the Salt of Hartshorn. That the saline Spirit arises chiefly from the bittern Salt, and not from the more perfect Sea-salt, is probable from hence, _viz._ when I distilled three Gallons of common Water, made as salt as Sea-water with common Salt; no Spirit of Salt arose, even tho’ the Distillation was carried so far as to leave the Salt, tho’ very damp, to lie in Heaps, and it was incrusted on the Sides of the Still, for about three Inches from the Bottom.