PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. oF 
Mr Joun Youne also sent a portion of the same specimen to Mr J. B. 
Hannay, who has published an analysis of it (quoted) differing very markedly 
from the above ; and he unites it with specimens of the same mineral (saponite) 
from Bowling Quarry—next to be noted—and has introduced it in the “ Miner- 
alogical Magazine” as a new mineral, under the name of Bowdlingite. 
Among the discrepancies which exist between Mr Hannay’s analysis and the 
above, the most marked is the amount of magnesia, which, instead of the 21 ° 231 
per cent. obtained by me, amounts in his analysis to only 11°73. The late Mr 
WALLACE Youne, however, in his original analysis gives the quantity, according 
to one statement, at 20-95, according to another at 21 : 9. 
9. From Bowling Quarry, on the Clyde.—The specimens were sent me by Mr 
Hannay as his “ bowlingite” upon my writing him of the discrepancy in our 
analysis of the above mineral, and of my doubts as to “bowlingite” being 
anything else than saponite. 
The specimens were not to be distinguished from the vein-saponite of Tay- 
port, in Fife. They were in the form of portions of a vein of nearly one inch in 
width. Colour, dark grass-green ; structure, fine foliated, but with pseudo- 
fibrous markings like slickenside. Scratches easily with the nail; streak very 
pale green, almost white. Contained imbedded crystals of calcite. Specific 
gravity, 2-308, being the average of four pieces chosen as being those most free 
of calcite. 
Was scraped down with the back of a knife, all gritty particles (calcite) 
being so removed. 
On 1-3 grammes— 
Silica, : : ‘A487 
From Alumina, . -008 
——— Hannay. 
*495 == 38 076 34°32 
Alumina, : bix(65263 18:07 
Ferric Oxide, . : 5 » 4°362 3°65 
Ferrous Oxide, 4-975 6°81 
Manganous Oxide, . : : °23 
Lime, . i : ; » p22 5°14 calcite. 
Magnesia, : ; . 21°461 9°57 
Potash, . g : : : 946 
Soda; 01s : ; é ; 106 
Water . : é 3 . 20°477 22-70 
99°968  100°26 
Loses at 212°, 12-315 per cent. of the water. 
