Observations on bituminous substances, with a description of the varieties of the elastic bitumen ... Read in the Linnaean Soc / by Charles Hatchett.

  • Charles Hatchett
Date:
[1798]
Catalogue details

Licence: Public Domain Mark

Credit: Observations on bituminous substances, with a description of the varieties of the elastic bitumen ... Read in the Linnaean Soc / by Charles Hatchett. Source: Wellcome Collection.

    3/28 (page 129)
    IX. Obfervations on Bituminous Subjlances, uvV/j Defcriptwn of the Varieties of the Elajlic Bitumen. Fr Charles Hatchett, Efq. F. F. *9. LeW. Edinb. F. L. *9. C5c. •i'/iri 07/? ' yfnl bm: jot ^ f ViTiTl YJfil ' 7 ^v• •• -f — Read Elay 2, 6, and July 4, 1797. IT is now generally believed that the bituminous fubftances are not of mineral origin, but that they have been formed from certain principles of fubftances belonging to the organized king¬ doms of Nature, which, after the lofs of animal and vegetable life, have buffered confiderable changes by long conta£f and union with mineral bodies. Thefe changes have been however fo confiderable, that the bitumens can no longer be referred to their firft origin, and they are therefore regarded by general confent as forming part of the prelent mineral fyflem. The bituminous fubftances are : Naptha, Petroleum, Mineral Tar, Mineral Pitch, Afphaltum, Vol.IV. S Jet, \