442 PROFESSOR HEDDLE ON 
8. G, 4916. 
Titanic Acid, : ; ‘ ’ 4 20°6 
Silica, ; , P : ; : 1:4 
Alumina, . : , ’ : ' 1° 443 
Ferric Oxide, : : 5 : ‘ 63 +549 
Ferrous Oxide, . : : : . 11°26 
Manganous Oxide, . - : : °018 
Lime, . : : : : ) ; 1°792 
100 : 062 
2. Taken from the great amazonstone boulder, from the west side of Ben 
Bhreck, Tongue. Occurred very rarely in blue-black plates, between crystals 
of the felspar. It was in very small quantity. It was very much more readily 
powdered and elutriated than was usual for this mineral. The powder was 
reddish or brownish-black,—not blue-black, as is usual. 
‘464 grammes yielded— 
Titanic Acid, } : : aa 50 * 646 
Ferric Oxide, : ; : : 9° 873 
Ferrous Oxide, . Z : : : 17° 784 
Manganous Oxide, . : : . 5°172 
Lime, . 2 ; : : ‘ i Salat 
Magnesia, . 5 : ; : : 11 +637 
Silica, : ; : i : ‘ Pere 
99° 373 
This is very much the most highly titaniferous ilmenite which I have 
analysed. 
3. From the “crocus” veins of the grey granite of Anguston, Aberdeen- 
shire. Occurs in thin brown-black plates, up to an inch in length; these lay 
between the quartz crystals, and seemed to have been of late deposition. The 
sphene, and Allanite which accompanied it in small quantity, were deeper- 
seated in the vein, and were quite closely imbedded. 
S. G. 4:908. 
Titanic Acid, ; : : : : Zorion 
Ferric Oxide, ; ; > : : 43 - 064 
Ferrous Oxide, . F ‘ : ’ 29-011 
Manganous Oxide, ; ; , 2° 341 
Lime, , ; , : : ; 1-006 
Silica, 2° 066 
LOL -.158 
When analysed by the “bisulphate process” only 22°88 per cent. of titanic 
acid was got; the above analysis was executed by employing Fresenius’s flux. 
