The Philosophical magazine; a journal of theoretical, experimental and applied physics . applied thesame principles to an arc of 1500 miles, or about 21° 30, run-ning south from Cape Comorin. But in this case, as the ten-dency is not for the crust to sink, but to be broken upwards bythe pressure of the lava, the arched form of the crust can offerno resistance to fracture. [2] There are one or two expressions in this latter part ofProfessor Hennessys remarks which I do not quite fear I have not been sufficiently clear in my explanation, Iwill therefore give the calculation again, a
The Philosophical magazine; a journal of theoretical, experimental and applied physics . applied thesame principles to an arc of 1500 miles, or about 21° 30, run-ning south from Cape Comorin. But in this case, as the ten-dency is not for the crust to sink, but to be broken upwards bythe pressure of the lava, the arched form of the crust can offerno resistance to fracture. [2] There are one or two expressions in this latter part ofProfessor Hennessys remarks which I do not quite fear I have not been sufficiently clear in my explanation, Iwill therefore give the calculation again, and with more detail,and with as near an approach as I can to the actual geographyof the parts which I bring under consideration. 1. Colonel R. Strachey, in his account of the Himalaya Moun-tains (now in the press), gives an outline map of the vast plateauof the Range, with the northern and southern slopes. By thehelp of this map the accompanying diagram is constructed. (Indrawing it, I have transported myself to England and supposedmyself viewing this country from the west.) Fig. A is the station Dehra (lat. 39° li>, long. 78° 6), about 2000 346 Archdeacon Pratt on the Thickness of feet above the sea: at this point the mountains begin decidedlyto rise, there being only the low Sewalik Range to the diagram represents a meridional section of the mountainmass through Dehra. A B is about 140 miles, or 2 degrees; B Cis about 230 miles, or 3y degrees : take C D equal to A B. Thesouthern mountain slope A B rises from A gradually to a heightof 15,000 feet at b, the intervening space abounding in peaks of20,000 feet and more. From Z> to c is the vast plateau, whichColonel Strachey places at an average height of 15,000 feetabove the sea. The northern slope from c onwards is not sowell known; and I do not enter upon any description of it, becauseit is not required for my purpose. Draw chord A. D, and let a w m n be a vertical line through a,the middle point of the p
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