368 Mr. H. E. Strickland on the Elevatory Forces 



grow less ; if, in addition to this, sickness follows in the train 

 of toil and disappointment, and unstrings the skilful hand and 

 quenches the lire of the inventive mind, then I confess that, 

 guilt and its consequences apart, I know of few sadder spectacles 

 in the varied drama of human life. 



A history of some of the cases of this nature which have come 

 iiuder your knowledge would, I think, be a valuable record — 

 valuable from its intrinsic interest, valuable as a beacon and a 

 warning. I presume that you are acquainted with a greater 

 number of such cases than any other person. That inventors 

 such as I have spoken of do really constitute a class apart, is, I 

 think, very evident. Generally it would perhaps be found that 

 they arc men of innocent and blameless lives, of great simplicity 

 of character, ignorant of the world, and perhaps for this very 

 reason imbued with a too great self-esteem, and an unwan*anted 

 confidence in their own powers. We should probably discover 

 in them as a class the peculiar effects which a life too special in 

 its pursuits tends to produce, and which in those who are more 

 favourably circumstanced are mitigated by intercourse with other 

 minds, by self-reflection, and by a knowledge of the peculiar 

 dangers to which they are exposed. 



I remain, my dear Sir, 



Ever sincerely yours, 



Professor De Morgan. George Boole. 



LIV. On the Elevatory Forces ivhich raised the Malvern Hills. 

 By H. E. Strickland, F.G.S.^ 



[Witli a Plate.] 



PEOFESSOR PHILLIPS has already pointed out (Mem. 

 Geol. SuiTcy, vol. ii. p. 5) that the syenitic ridge of the 

 Malvern Hills forms a part of a great line of dislocation, extend- 

 ing for at least 120 miles from Flintshire on the north to So- 

 mersetshire on the south. He shows that this line of disturb- 

 ance forms the eastern boundaiy of that vast region of elevation 

 which includes the whole of Wales and pax*t of Southern Ireland, 

 and that the principal movement which caused this elevatioij 

 took place between the Carboniferous andTriassic epochs t, He 



* Communicated by the Author. 



t We cannot gp^ak more precisely as to the date of a convulsive move- 

 ment which perhaps extended over a considerable period. According to 

 the researches of Sir R. Murchison in other regions, an entire geological 

 epoch, — that of the " Permian System " — intervened between the Carbo- 

 niferous and the Triassic systems. But deposits of this age are scarcely, if 

 at all, traceable in the region here described ; and we cannot therefore 

 AMcrt whether th^ M^vcra ridge wa;^ elevated at the begiiming, the middle. 



