Page:Experimentsnotes00boyl.pdf/44



Aving a mind likewise to shew some Ingenious men, how much the production of Heat and Cold depends upon Texture and other Mechanical Affections, I thought fit to make again a Sal Armoniac by a way I formerly publish'd, that I might be sure to know what Ingredients I employ'd, and shew their effects as well before conjunction as after it. I took then Spirit of Salt, and Spirit of fermented or rather putrified Urine; and having put a seal'd Weather-glass into an open Vessel, where one of them was pour'd in, I put the other by degrees to it, and observ'd, that, as upon their mingling they made a great noise with many bubbles, so in this conflict they lost their former coldness, and impell'd up the Spirit of Wine in the seal'd Thermoscope: Then slowly evaporating the superfluous moisture, I ob-