104 Lieut. Baddeley on Sulphate of Strontian, <^c. 



red felspar may be observed in large masses in the limestone, render- 

 ing it porpliyroidal, whilst in the calcareous greenstone to which it 

 is attached, and into which it also runs in large veins, hornblende 

 forms a most considerable part, and we shall soon perceive that 

 near where the junction of the sienite and limestone occurs, the 

 roughly porphyroidal structure is yet more common,* whilst the still 

 more surprizing circumstance is yet to be detailed, that distinct and 

 very perfect testaceous organic remains exist in the rock at points 

 where the granite and limestone are actually interlaced and inter- 

 mixed, where limestone is penetrated with quartz and with horn- 

 blende from a rock in which felspar holds the most conspicuous 



and prominent feature. 



(To be continued.) 



Art. XIX. — Mineralogical examination of the Sulphate of Stron- 

 tian, from Kingston, (U. C.j;f with miscellaneous notices of the 

 Geology of the vicinity ; by Lieut. Baddeley, of the Royal 

 Engineers. 



(Communicated for tins Journal.) 



REMARKS BY THE EDITOR. 



We have for several years, observed with much satisfaction, that 

 science has obtained a good foothold, and is fast gaining ground in 

 Canada. Numbers of intelligent gentlemen, especially in Lower 

 Canada, are investigating its natural history and resources, and have 



* Similar associations occur in the Carinthian Alps and in the limestone of the 

 Tarentaise, and in the little St. Bernard, " This phenomenon of the association of 

 lime and felspar," Humboldt observes, " is so much the more remarkable, as lamel- 

 lar felspar and granular and compact limestone appear to manifest every where else 

 in their geognostic relations, a kind of repulsion much stronger than what is observ- 

 ed in some countries, betweeii hornblende and limestone." 



t In the Transactions of the Literary and Historical Society of Quebec, just pub- 

 lished, may be seen an article by Capt. Bonnycastle, R. E. on the characters of this 

 mineral ; but as we differ as to the name, and I believe in other particulars, I have 

 thought it not superfluous to give the characters as they appeared to me, particu- 

 larly as they have been taken without access to Capt. B.'s paper. § 



§ I have seen Capt. Bonnycastle's notice of this controverted mineral, (Quebec 

 Trans, p. 70) but such is the similarity between the two natural sulphates, that no one 

 of the characters which he has named appears to be decisive ; the taste of the mass, 

 which had been ignited upon charcoal, is the most so, but I have found that both these 

 sulphates are decomposable by charcoal in the furnace, and that both give the taste re- 

 ferred to after being ignited by the blowpipe upon charcoal ; but this taste is very re- 



