414 0)i Some Points in Chemical Geology* 



Canadian Linnet, contrary to its custom, was to be found in the 

 woods, and was caught, and sold in the markets. Much inferior 

 to the English linnet, still the song of this species is musical and 

 agreeable. 



Etnberlza nivalis, Snow Bunting. — Very abundant all winter. 

 One person in the Island of Orleans trapped in four days last 

 winter sixty dozen. There is in Canada a bird of the size of the 

 snow-bird, to be found in the flocks of snow-birds. The country 

 folks call it Ortolan de Niege ; it is prettily variegated with 

 brown, white, and yellow.* Unlike the snow-bunting, it never 

 roosts on trees, and is easily domesticated. Its note is a low, 

 continuous warble, very pleasing to the ear, particularly so when 

 proceeding from a flock of these birds feeding in a stubble field, 

 their usual haunt, a few hours before sunset in April. 



ARTICLE XXXIII. — On Some Points in Chemical Geology. 

 By T. Sterry Hunt, M.A., F.E.S., of the Geological 

 Commission of Canada. f 



I. In a paper read before the American Association at Mon+real 

 in August 1857, as also in some previous communications to the 

 Boyal Society, and in the Report of the Geological Survey of 

 Canada for 1856, I have endeavoured to explain the theory of 

 the transformation of sedimentary deposits into crystalline rocks. 

 In considering this process we must commence by distinguishing 

 between the local metamorphism which sometimes appears in the 

 vicinity of traps and granites, and that normal metamorphism which 

 extends over wide areas, and is apparently unconnected with the 

 presence of intrusive rocks. In the former case, however, we find 

 that the metamorphosing influence of intrusive rocks is by no means 

 constant, showing that their heat is not the sole agent in alteration, 

 while in the latter case different strata are often found affected in 



* No doubt Phileremus cornutus, Bon. Alanda alpestris, Wils. — Eds. 



f This paper, written and sent to the Geological Society of London 

 in August 1858, was not read before that body until the 5th of January 

 1859. An abstract of it appears in the proceedings of the Society in 

 the Philosophical Magazine for February, and it is published at length in 

 the Quarterly Journal of the Geological Society for November 1859, pp. 

 488-496, from which it is now reprinted, with the addition, by the author,, 

 of a few notes, which are distinguished from those before published by 

 being enclosed in brackets. 



