. Edinburgh New Philosophical Journal. in the Middle Begion of Scotland. 175 to indicate tbat the grooving agent was deflected from its original course. In the district generally, the uniformity of direction being so great, a mei-e list of the localities is nearly all that is requisite. Arrow No. 15. On the west shoulder of Demyat, three miles from Stirling, 500 feet above the sea, direction ESE. 16. At Torwood, four miles NW. from Falkii^k, arrow 16, direction ESE., observed by Sir J. Hall. In this and the preceding, the bearing of the striae corresponds with that of the upper part of the Fri
. Edinburgh New Philosophical Journal. in the Middle Begion of Scotland. 175 to indicate tbat the grooving agent was deflected from its original course. In the district generally, the uniformity of direction being so great, a mei-e list of the localities is nearly all that is requisite. Arrow No. 15. On the west shoulder of Demyat, three miles from Stirling, 500 feet above the sea, direction ESE. 16. At Torwood, four miles NW. from Falkii^k, arrow 16, direction ESE., observed by Sir J. Hall. In this and the preceding, the bearing of the striae corresponds with that of the upper part of the Frith of Forth, and with the remark- able furrows on the rock of Stirling Castle, of which the figure below is a rough sketch, borrowed from the " Sketch of the Geology of Fife and the ; Fig. This rock forms an isolated hill, rising 300 feet, at S, above the plain which surrounds it. The highest part is an escarpment of trap, a, b, c, d, e, fronting the north-west. The furrow, or rather ravine, dividing the ridge a, from the ridge 6, is about 60 feet deep, and sharply cut. The others, be- tween b and c, c and d, d and e, are from 15 to 40 feet, and they all point north-westward. The coincidence in bearing of these furrows with the striae on Demyat, 3 miles northward, and with the others at Torwood (arrow 16) is interesting. 17. On trap, one mile south from Borrowstounness, about 150 or 200 feet above tlie Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
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