320 Mr D. Stevenson's Remarlns on the 



Upon a review, therefore, of the whole evidence, it appears 

 to me, that there is nothing to warrant us in considering the 

 limestone at Burdiehouse as a pure lacustrine formation ; that 

 the series of coal-measures there are different in geological 

 characters from other series of carboniferous deposits ; or that 

 the limestone bed in question was formed under conditions dif- 

 ferent from those of the shales, sandstones, ironstone, and seams 

 of coal with which it is associated. 



In thus freely expressing my doubts of the soundness of the 

 conclusions to which Dr Hibbert has arrived, I trust that I 

 have not exceeded the limits of fair scientific criticism ; and I 

 farther hope, that nothing which I have said can be construed 

 as inconsistent with a just admiration of the industry and zeal 

 displayed by him in these researches, or with the respect that is 

 due to him, for his many valuable contributions to science and 

 literature.* 



Remarks mi the Dublin and Kingstown Railway^ intended as a 

 Supplement to a former Paper on the Liverpool and Man- 

 chester Railway, in the \Sth Volume of this Journal, 1835. 

 By David Stevenson, Esq. Civil-Engineer, Edinburgh.-f 

 With a Plate. 



Since my paper on the Liverpool and Manchester Railway 

 was laid before this Society, in the month of February last, I 

 have, in the course of my professional pursuits, visited most of 

 the public railways of the United Kingdom, and, in connection 

 with this subject, I also paid a visit to some of the great iron- 

 works in Wales. 



The application of tram-roads and wooden railways to the 



• Since this paper was read, I have seen the fifth Livraison of the work of 

 M. Agassiz, " Sur les Poissons Fossiles," in which particular mention is made 

 of the researches of Dr Hibbert at Burdiehouse. I have not found any ob- 

 servation of M. Agassiz at variance with the opinions 1 have ventured to ex- 

 press, and I observe, that, in speaking of the Sauroides, he specially calls the 

 attention of his readers to his opinion, that they do not form a family inter- 

 mediate between ordinary fishes and reptiles, adding, " En efFet, mes Sau- 

 roides sont de vrais poissons ; ce sont les premiers poissons voraces qui aient 

 vecu dans les mers d'autrefois." 

 8*ft MarcA 1836. 



t Read before the Society of Arts, for Scotland, 9th March 1836. 



