EXPER. IV.
SInce if two bodies upon their mix∣ture acquire a greater degree of Cold than either of them had be∣fore there is a production of this additional degree of that Quality, it
Experimental notes of the mechanical origine or production of fixtness.
About this Item
- Title
- Experimental notes of the mechanical origine or production of fixtness.
- Author
- Boyle, Robert, 1627-1691.
- Publication
- London :: Printed by E. Flesher, for R. Davis Bookseller in Oxford.,
- 1675.
- Rights/Permissions
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To the extent possible under law, the Text Creation Partnership has waived all copyright and related or neighboring rights to this keyboarded and encoded edition of the work described above, according to the terms of the CC0 1.0 Public Domain Dedication (http://creativecommons.org/publicdomain/zero/1.0/). This waiver does not extend to any page images or other supplementary files associated with this work, which may be protected by copyright or other license restrictions. Please go to http://www.textcreationpartnership.org/ for more information.
- Subject terms
- Solids -- Early works to 1800.
- Cite this Item
-
"Experimental notes of the mechanical origine or production of fixtness." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A69611.0001.001. University of Michigan Library Digital Collections. Accessed May 5, 2024.
Pages
Page 10
will be proper to add on this occasi∣on the ensuing Experiment.
We took a competent quantity of acid spirit distill'd from Roch-allom, (that, though rectifi'd, was but weak,) which, in the spirit of that salt, is not strange. Of this we put into a wide mouth'd Glass (that was not great) more than was sufficient to cover the globulous part of a good seal'd Thermoscope, and then suffer∣ing the instrument to stay a pretty while in the liquor, that the Spirit of wine might be cool'd as much as the ambient was, we put in little by little some volatile salt sublimed from Sal Armoniac and a fixt Alcali, and notwithstanding the very numerous (but not great) bubbles, and the noise and froath that were produced, as is usual upon the reaction of Acids and Alcalys, the tincted spirit in the Weather-glass, after having continu∣ed a good while at a stand, began a little to descend, and continued (though but very slowly) to do so, till the spirit of Allom was glutted
Page 11
with the volatile salt; and this de∣scent of the tincted liquor in the In∣strument being measur'd, appear'd to be about an inch (for it manifestly exceeded seven eighths.) By com∣paring this Experiment with the first part of the foregoing, we may gather, that when Volatile and Urinous Salts or Spirits (for the saline particles appear sometimes in a dry and some∣times in a liquid form) tumultuate upon their being mixt with Acids, neither the Heat nor the Cold that ensues is produc'd by a Conflict with the Acids precisely as it is Acid, since we have seen that an urinous spirit produc'd an actual Heat with spirit of Salt, and the distill'd Salt of Sal Ar∣moniac, which is also Urinous, with the acid spirit of Roch-Allom produces not a true effervescence, but a mani∣fest Coldness: As the same Salt also did in a Trial of another sort, which was this.