172 Proceedings of Boy al Society of Edinburgh, [fee. 20, 
SiO^ 
T1O2 
CO2 
PA 
AI2O3 
FeO 
MgO 
CaO 
K2O 
Na20 
H26 
36*8 per cent. 
2-6 
>} 
n-9 
0-75 
jj 
)) 
22-95 „ 
4-08 
2-85 
9-73 
1-1 
0*5 
7.7 
3 ) 
53 
53 
33 
53 
33 
100*96 per cent. 
1 *44 hygrosc. water. 
According to this result, the “ white trap” may, in its main part, 
he regarded as consisting of 
56 per cent, kaolin, and 
26*6 „ carbonates. 
Ample details of all these investigations are given in my paper 
mentioned at the beginning of this communication. 
By permission of the Society, Dr John Murray exhibited some 
phosphorescent animals brought from the deep water of Loch Long 
and Loch Goil. 
4. Experimental Researches in Mountain Building. By 
Henry M. Cadell, Esq. of Grange, B.Sc., F.R.S.E., of H.M. 
Geological Survey of Scotland. 
