THE MINERALOGY OF SCOTLAND. 449 
It yielded — 
Titanic Acid, : : : ; ‘ 10°6 
Alumina, . : : : : ; °072 
Ferric Oxide, : ‘ ; ; : 80° 876 
Ferrous Oxide, . ‘ = : , 5:961 
Manganous Oxide, . : : : "4 
Lime, . P : ‘ ‘ : 5 °952 
Silica, P : ‘ : ; : ILS 
100-361 
3. Occurs in imbedded fragmentary or sharp-angled masses, of the size of 
peas, in a basaltic dyke which cuts tufa, half a mile east of the Summer House 
on Elie Ness. 
Colour velvet black, fracture conchoidal, very hard ; associated with olivine, 
saponite, and pyrope. 
On 1 gramme— 
Titanic Acid, F i : 3 : DAL 
Ferric Oxide, ‘ : : 5 ; 42673 
Ferrous Oxide, . ; ; ; ; 21°894 
Manganous Oxide, . 3 : 5 "% 
Lime, . : : F : i ‘ 4°48 
Magnesia, . . ; ; : : 1-6 
Silica, . . p : : : 5 fee 
100° 147 
4. Was found, along with Professor GEIKIE, in small, brilliant, crystalline, 
highly magnetic grains, on the surface of the sand, below the sandstone cliffs 
near Ardross Castle, St. Monance, Fifeshire. 
On 1 gramme— 
Titanic Acid, . . ; : ; : 16. 
Ferric Oxide, : : ; : : 43 +743 
Ferrous Oxide, . P : F ; 28:01 
Manganous Oxide, : : ‘ , “dl 
Lime, . : ; : : : ; 4-4 
Silica, . : ; : : , ; Tis 
99 +253 
Under the microscope, showed as a mass of fine grains of a blue-black 
colour. Many of these seemed to be regular octahedrons. 
5. Is found at the mouth of a:small stream in small quantity, on the surface 
