Page 494
THat the Spirit of Human Blood is in re∣spect of some Liquors potentially Cold, since it refrigerates them, and with reference to others potentially Hot, since being mixed with them it renders them Hot, may appear from the following instance; for having put the lower end of an Hermetically sealed Weather-Glass into a slender Cylindrical Glass, we poured as much moderatly strong Spirit of Blood into it as covered the Ball, and then dropped on that Liquor some good Spirit of Salt, upon which ensued a conflict accompa∣nyed with a Noise, Bubbles, and Heat, which made the Spirit of Wine presently ascend a∣bove two Inches and a half; which Experi∣ment seems to be the more remarkable, be∣cause several other Volatile Alkalies being mix∣ed with Acids, produce a notable degree of coldness; and whereas I had several times found by Tryal, that the Spirt of Verdigrease would, with Volatile Salt of Sal-Armoniack or Urine, produce a real coldness. This Spi∣rit of Verdigrease being mixed in the small Cylindrical Glass, with Spirit of Blood mode∣rately strong, not only produced a hissing Noise and store of Bubbles, but an actual Heat, upon which the Liquor in the Thermoscope