PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. 30 
the loose state of the rock I conceive that alteration and peroxidation may 
have extended to the centre of the crystals, and that specimens from a greater 
depth will altogether accord with Haughtonite. 
ts sole associate was the felspar. 
1°3 grammes yielded— 
Silica, . : Ses, ‘44 
From Alumina, . ; °004 
Aa. ==) 849453 
Alumina, . ; ; ») Laa837 
Ferric Oxide, . ; 5» IMLS 
Ferrous Oxide, . : | tena. 
Manganous Oxide, . . 1:°384 
Lime, ; : : “1 L809 
Magnesia, . : OP SOT 
Potash, . ; f we AIS 
Soda, : 2 : 2 BURBS 
Water, : : ; Se Ns: 
99° Oil 
14. The following does not accord with the others as regards the quantity of 
alumina, which is here much larger ; in other respects it seems the same. It 
occurs in comparatively small amount on the southern slopes of the hill of 
Clashnaree, in Clova, Aberdeenshire. 
It is associated with red andalusite, labradorite, fibrolite, and margarodite, 
which minerals occur not in veins, but in layers or bands of the rock. The 
mica is of a brilliant lustre, and a bronzy-brown colour. <A sufficiency for 
analysis was got with much difficulty, and it may not have been altogether free 
from gaugue, and possibly also from labradorite. 
1:2 grammes yielded— 
Silica, . é ‘ : "448 
From Alumina, . ; °02 
SAGG? == gos 
Alumina, . f ; . 25°096 
Ferric Oxide, . : ~ "or ol4 
Ferrous Oxide, . A eo te Ou 
Manganous Oxide, . : 666 
Lime, 5 : B ~ "933 
Magnesia, . ; ‘ ae 21166 
Potash, ~~: A P as 0 084 
Soda, ! ‘ : £626 
Water, . ; : . 3°466 
100332 
VOL. XXIX. PART I. I 
