270 Capt. Sabine on the Presence of the Waters of the 



whatever. My observation has not yet been sufficiently va- 

 ried for forming an opinion concerning the justice of these re- 

 marks ; but, in the meantime, I may state, whatever the ra- 

 tionale may be, that when spodumene is mixed up into a paste 

 with fluate of lime, and the blow-pipe flame is thrown upon it, 

 a brilliant red colour appears ; whereas spodumene alone does 

 not yield a trace of redness. 



With respect to the lithion-micas, I may add, that the pre- 

 sence of potash is most likely one cause of the facility with 

 which they fuse. For I have remarked, that though the 

 compounds of lithia themselves are easily fusible, they become 

 much more so when potash is likewise present. Thus, the 

 mixed carbonates of potash and lithia fuse at a lower tem- 

 perature than pure carbonate of lithia. In like manner, the 

 mixed muriates are more easy of fusion than pure muriate 

 of lithia ; and the same observation is applicable to the sul- 

 phates. 



(To be continued.) 



Art. XI. — Observations on the Presence of the Waters of the 

 Gulf-Stream on the Coasts of Europe, in January 1822.* 

 By Edward Sabixe, Esq. F.R.S. F.L.S. &c. &c. 



The Iphigenia sailed from Plymouth on the 4th January 

 1822, after an almost continuous succession of very heavy 

 westerly and south-westerly gales, by which she had been re- 



• This very interesting paper is abstracted from Captain Sabine's Ac- 

 count of Experiments to determine the Figure of the Earth by means of the 

 Pendulum vibrating seconds in different Latitudes, as well as on various 

 other subjects of Philosophical Inquiry. 4to, Lond. 1825. This valuable 

 work, printed at the expence of the Board of Longitude, and dedicated to 

 Davies Gilbert, Esq. M. P., exhibits, in a striking point of view, the varied 

 talents of its author, and bears testimony to the zeal and ability with which 

 he has fulfilled the scientific mission with which he was entrusted by the 

 British Government. Besides the experiments with the pendulum, it 

 contains various interesting geographical notices ; experiments for deter- 

 mining the variation in the intensity of terrestrial magnetism, and se- 

 veral curious atmospherical notices.— En. 



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