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Published online by Cambridge University Press: 17 January 2013
The zeolite subjected to the following experiments, possesses some of the distinguishing properties common to other stones of the same class, but differs in certain respects from any variety with which I am acquainted. I found it, more than three years ago, in the basaltic rock on which the Castle of Edinburgh is built; and it was inclosed within a mass of prehnite.
page 301 note * I Made use of small quantities only of the zeolite in all these experiments; because, as the specimen appears to be the only one of the kind which has been found, I wished to preserve as much of it entire as possible.
page 302 note * The experiments which, shewed that soda, was the alkaline basis of this salt, have not been stated here; because I formerly gave a description of the methods used in examining the same salt, in the paper on Whinstone and Lava, published in Part I. of this volume, (p. 85.). To avoid unnecessary repetition, I beg leave to refer to that paper, both with regard to the manner in which. I endeavoured to determine the purity of the saline matter, and also that of the filex, and fome other earths.
page 303 note * Voyages dans les Alpes, 1923.
page 303 note † Kirwan's Mineralogy, vol. 1. p. 278, Traité de Mineralogie par Hauy, tom. 3. p. 151 and 227.