1826J! Ahdtpes of BookK 216 



acids than the sulphuric. Glacial phosphoric acid was heated 

 and shaken in naphthaline, but without any particular results. 

 A little water was then used with another portion of the mate- 

 rials, to bring the phosphoric acid into solution, but no decided 

 combination could be obtained. Muriatic acid gas was brought 

 into contact with naphthaline in various states, and at various 

 temperatures, but no union could be effected either of the sub- 

 stances or their elements. 



Very strong solution of potash was also heated with naphtha- 

 line, and then neutraUzed by sulphuric acid; nothing more, 

 however, than common sulphate of potash resulted. 



As the appropriation of a name to this acid will much facilitate 

 future reference and description, I may, perhaps, be allowed to 

 suggest that oi sulpho-naphthalic acid, which sufficiently indicates 

 its source and nature, without the inconvenience of involving 

 theoretical views. 



Article V. 

 Analyses of Books. 



A Description of active and extinct Volcanos, with Remarks on 

 their Origin, their Chemical Phenomena, and the Character of 

 their Products, as determined hy the Condition of the Earth 

 during the Period of their Formation, Being the Substance of 

 some Lectures delivered before the University of Oxford, with 

 much additional Matter. By Charles Daubeny, MD. FRS. 

 8cc. &:c. Professor of Chemistry, and Fellow of Magdalen 

 College, Oxford. London, 1826: 8vo. 



It is not many months since we had the satisfaction of laying 

 before our readers an analysis of a work on volcanos by Mr. 

 Poulett Scrope;^ it now becomes our duty to notice another 

 publication which has just appeared on the same subject, the 

 plan of which is of a more extended description, as it embraces 

 not only a theory of volcanic operations, but likewise a detailed 

 statement of the phsenomena, both of a geological and chemical 

 nature, which arise from them. 



The author informs us, that he was first led to the inquiries 

 which have furnished him with materials for the present work, 

 by a wish to obtain some further evidence with respect to the 

 origin of basalt, the nature of which still continued the subject 

 of warm discussion, during the time at which he was pursuing 

 his studies at Edinburgh. Conscious that all the hght that 

 could be thrown upon this question by reference to the charac- 

 ters and relations of trap rocks themselves, had been already 



• See Amah for January last. 



