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[[start page]] (156 [[start left margin]]The same liquor requires different degrees of heat to boil it at different heights of the Barometer. Liquids do not freeze in the same order as they boil by heat. How [[underline]] Fahrenheit [[/underline]] graduated his Thermometer. " The ingenious inventor of quicksilver Thermometers "Mr. [[underline]] Fahrenheit [[/underline]] hath discovered, that when the Barometer marks a "greater pressure of the [[strikethrough]] Sphere [[/strikethrough]] atmosphere, the same liquor will "receive 8 or 9° more of heat [[insertion]] to boil it [[/insertion]] than when the Barometer is at the "lowest."[[line across the page]] "These, and all other liquids, by a certain determinate "degree of cold peculiar to each sort, lose their fluidity, and freeze, or become solid, but not in the same order as by "heat they boil; for by cold, oil or water is sooner frozen "than spirit of wine, tho' spirit of wine will boil sooner "than oil or water. All solid bodies likewise, as minerals, "metals, and even stones, will become fluid, or melt, as a "certain degree of heat peculiar to each species; and, when "thoroughly melted, it is probable they are capable of receiving "no higher degree of heat; and, on the absence of that heat to "a certain degree, they all return to their natural solid state." p. 436. "[[underline]] Fahrenheit [[/underline]] begins [[insertion]] the [[/insertion]] scale of his Thermometer from O. "the point to which the mercury hath been observed to fall by "the greatest cold in [[underline]] Ysland [[/underline]]; and computes, that the mercury "then occupies 11124 parts. This is his point of no heat. Then "reckoning upwards from this, he finds that when the "mercury is rarified only 32 parts or degrees more, com= "mon water just begins to freeze: in temperate air it "will rise to 55." &C. p.439. [[Left margin]]Heat requisite to boil several liquids, and to melt several Metals. [[/left margin]] [[underline]]Alcohol[[\underline]], or highest rectified Spirit of Wine, boils at 174.° -p.439 Strongest Sunshine about 80. -p.444. Spirit of Wine boils at 176. - D.° [[delta]] Water at 212. D.° The [[underline]]lixivium[[\underline]] of Salt of Tartar at 240. D.° Spirit of nitre at 242. D.° Oil of Vitriol at 546 D.° [[Mercury symbol]] Quicksilver at 600 D.° [[Jupiter symbol]] Tin melts at (the easiest of all metals to melt) 408 D.° [[Saturn symbol]] Lead at 540 D.° [[underline]]Ol. vap. ebull. [[\underline]] Oil boils violently at 714 D.° [[underline]]Reg.[[\underline]][[Earth symbol]] (I suppose) Regulus of Antimony at 810 D.° [[Moon symbol]] Silver melts at about 1000 D.° [[Sun symbol]] Gold at about 1250 D.° [[Venus symbol]] [[strikethrough]]Iron [[/strikethrough]] Copper at about 1420 D.° [[Mars symbol]]Iron, (the most difficult of all metals to melt) at 1590 D.° [[In small script]] Mr. Harrison, in the principles of his time- keep.p.31.Says, One part of pewter & 12 of lead melt at 567 degrees of Fahrenheit's scale, Therefore Pewter melts at 891. [[/small script]]
