350 



variety of considerations, that I must not trespass now on 

 the time of this meeting by further remarks on the subject. 



The question has frequently occurred to me whether the 

 vibrations, repeated during a long series of ages, which 

 (according to Mr. Darwin) may be supposed to accompany 

 the elevation of a mountain chain, may not have produced 

 considerable changes, all tending to crystalline forms in the 

 molecular constitution of some of the basaltic and metamor- 

 phic rocks. It is now an admitted fact that malleable iron, 

 and other metals in a fibrous state, assume the crystalline 

 under the influence of vibration, and without the agency of 

 heat. My friend, Mr. William Lucas, has made valuable 

 experiments on these changes in metals ; and I could also 

 have wished to offer a few remarks on two very interesting 

 papers by Mr. Robert Mallet, in the 3rd vol. of the Journal 

 of the Geological Society of Dublin, Part I., No. 2, and 

 Part III., No. 2, but I fear that my present paper is already 

 too long. I shall, therefore, only add how entirely I concur 

 in the valuable suggestion of Mr. Mallet, — " that all the 

 Observatories in connection with the magnetic survey should, 

 in addition to their magnetic observations, record observa- 

 tions as to the occurrence of earthquake shocks." 



James Yates, Esq., F.R.S., remarked on the interesting 

 character of Mr. Solly's paper, and particularly the fact which 

 he had stated of the raising of the coast of Lima by an 

 earthquake some years ago ; a fact which was recorded by 

 Mrs. Maria Graham, and had been greatly disputed. 



Earl FiTzwiLLiAM in a few remarks corroborated the 

 observations of Mr. Yates, as to the value as well as 

 interesting nature of the paper just read. 



It was then arranged that the remaining business should 

 be adjourned to the Evening Meeting, and after a vote of 

 thanks to Earl Fitzwilliam, moved by Dr. Scoresby and 

 seconded by Mr. Yates, the Meeting adjourned. 



