cxl Report of the Mineralogical Survey [No. 126*. 



The temperature was observed to be 73°, once at six feet, and again at 

 eight feet, that of the surface being 59°. 



295. I have here concluded the geological details; some few par- 

 ticulars have been omitted in their places, but will be hereafter 

 inserted with fresh matter, which I hope will render it something 

 more complete. I have principally to regret, that the circumstances 

 under which these papers have been prepared, have prevented the 

 execution of the original design of referring in the account of the 

 occurrence of rocks by number to the particular specimen collected. 

 Such a practice will be of very great advantage, and will indeed 

 give the above detail far more authority, than it could possible other- 

 wise have. I shall now proceed to state, in a few words, the general 

 results to which they lead. 



Section III. 



RECAPITULATION. 



296. In the details just given, I have necessarily entered into a 

 minuteness of description, which to the general reader must be 

 tiresome in no small degree. The paper being intended as a record of 

 observations, it was necessary to be particular ; but I shall attempt in 

 this section to throw together the general results, comparing them 

 afterwards with received opinions, and illustrating the whole in the 

 best manner my limited reading will permit. 



297. It appears then, that in these mountains gneiss occupies the 

 greater part of the surface, forming a band of 24 miles in breadth, and 

 including within its boundaries all the elevated summits, but one, of the 

 table, at Art. 39. Of these all that have been approached sufficiently 

 near to determine the point are certainly gneiss, that is, if distinct, thin, 

 and well-marked strata be any ground for deciding. Other evidence 

 there can be none, as it is impossible, by actual examination, to 

 ascertain what rock is at the summit. It rises then most probably to 

 the height of 25,709 feet,* while the lowest point is only elevated 2,800. 



* Captain Webb gives 25,669 as the height above the sea— Journal of Science. 

 The paper by Major Hodgson and myself in the 14th Vol. Ab. Ues. has 25,749. 

 1 have taken the mean. 



