170 INORGANIC CONSTITUENTS OF THE 
On glancing at these last four analyses one is struck with the 
fact that the phosphoric oxide seems to increase with the quantity 
of organic matter, and that the quantity of alumina in the soluble 
portion does not bear the same relation to that in the insoluble as 
it does in the coal ashes. The analyses were not made in expecta 
ratio between the insoluble and soluble alumina in the various 
analyses of the northern coals is as follows :— 
A. A. Company... 1:65 Wallsend ... ... 1:34 
Ware 1 3.48 New Lambton ... 1:27 
Clarence River ... 1 : 4:4 Redhead. .): <1... 2 
Newcastle Co. 1:42 Roof Galley Way 1:05 
0-operative bP: 39 oor: 
Ferndale ... ... 1: 36 ,, OldNo.1 Way 1 : 0-4 
These ratios exhibit a surprising difference, and appear to indi- 
‘cate that the ash constituents of the coal are not derived simply 
from admixture of the material of the floor or roof in an t 
‘State. Unfortunately the whole of the samples had either been 
could not be made. - 
It has been suggested by Dana! that the alumina ps 
at may have been in some measure derived i bre 
tycopodiaceous plants as lepidodendron, which suggestion 
on the iseiiniaaie of Dr. * ‘Aderholdt and Prof. Church on the 
ashes of various lycopodiums. Alumina found in the 
plants is generally 
Aderholdt? found that the ashes of Lycopodium chamee 
: ‘ sa t 
every precaution to remove adherent alumina from F 
cent; 
* and 
* Manual of Geology, J. D. Dana, 2nd Ed., 366 (1874). 
? Ann. d. Chem. u. Pharm., Ixxxii, 111 (1852). 
> Chem, News, xxx, 137 (1874). 
4J. Pr. Chem., xl, 302, 
