Some new experiments, with observations upon heat, clearly shewing the erroneous principles of the French theory : also, a letter to Henry Cavendish, containing some pointed animadversions; with strictures upon some late chemical papers in the Philosophical Transactions, and other remarks / by Robert Harrington.

  • Harrington, Robert, 1751-1837.
Date:
1798
Catalogue details

Licence: Public Domain Mark

Credit: Some new experiments, with observations upon heat, clearly shewing the erroneous principles of the French theory : also, a letter to Henry Cavendish, containing some pointed animadversions; with strictures upon some late chemical papers in the Philosophical Transactions, and other remarks / by Robert Harrington. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    24/172 page 16
    [ ] in length, and about half an inch in diame- ter ; having clofed it at one end, I filled it •with this diflblved mafs of fulphur and iron, about one part of the former, and three of the latter. After having near filled it, I clofed the other end of the cylinder, then drilled two holes at each end through the iron cylinder, and through a part of the mafs, fo that I introduced two golden wires into them; bringing their points near to- gether: the drilled holes being confidcrably larger than the wires, I poured melted glafs into them, fo as to infulatc all the parts of the golden wires in the mafs, except their points. Then, by drawing through the mafs the flrongeft eledrical fire, and alfo by examining that part of the mafs through which the fire pafTed; I found it clearly, beyond all difpiite vitriolatcd.— Copper anfwers, I think, better than iron for the experiment, and I generally found the internal fide of the iron cylinder vitriolated. Sometimes I have thought that the experi- ment would have anfwered better if the fulphur and the metals w^ere placed in the cylinder without being melted, the former in powder, and the latter in filings. Some- times, in thefe experiments, fubfiituting phofphorus in (lead of fulphur. After 1 heard of Mr. Cuthbertfon’s expe- riments on metals, by eledlricity in the air pump, in vacuo^ and in the different airs, I performed
    digitised image 1
    digitised image 2
    digitised image 3