Some time since, specimens of a peculiar-looking rock, found at Fintry, in the Campsie district, were put into our hands for analysis. The specimens were of a light chocolate-brown colour, and apparently homogeneous. They were somewhat harder than ordinary limestone, had a waxy lustre, and broke with a sharp-edged splintery fracture, translucent upon the thin edges. With hydrochloric acid they effervesced slowly, at the same time gelatinising. The specimens were weathered white to a considerable depth.