Sidney Melmore—The St. Bees Sandstone. 19 
The results are as follows :— 
Ile iste 
SiQ2. : ; i; A 83-99 85-96 
Aly O3 5 , 5 ; 8-37 6-93 
Fes O3 3 j 5 ; 1-61 1-36 
He On mae. : i F none none 
Mn O2 4 R i ‘ none , none 
CaO. } P : : 0-49 _ 0-49 
MgO i b : é 0-26 0-11 
KO. ; , d ; 3-412 2-844 
Naz O t : : ‘ 1-253 0-70 
CQ.. : ; P 0-026 0-026 
Hz» O (combined) F : 1-11 0-723 
Sulphuric acid (S Os) : 0-31 0-32 
100-831 99-463 
I. St. Bees Head. II. Quarry at Calder Abbey. 
2h 
CA %,  %  &, Age We, 
Combined. Weter —— : Sulphuric Acid --------- 
Fic. 2. 
The amount of combined water in the samples from St. Bees 
Quarry and the quarry at Whinscales was also determined, as also 
the iron at the latter place. The percentage of combined water and 
sulphuric acid are stated graphically in Fig. 2, as by this means the 
variations are more easily seen. The amount of ferric oxide is fairly 
constant, but shows a slight increase towards the northern end of the 
basin. The total alkalis show a marked increase in this direction. 
2. THe AREA NoRTH oF Maryport. 
The remarks on the tectonics of the southern area apply also to this 
northern basin, but the constant dip is to the north. 
Samples were taken from quarries on the coast at Maryport, from 
a quarry at Hayton, from the West Newton Quarries, and from a 
quarry at Red Dial near Wigton. Fewer cases of secondary silica 
were noticed in the specimens from this basin, but when they 
occurred they were of the same order of magnitude as those in the 
southern basin. 
The amount of combined water was determined in the samples 
from Hayton and Wigton. The value of the combined water at 
Maryport is somewhat less than that of St. Bees, but it rises steadily 
to a maximum near West Newton, and then begins to decrease. 
