Reaction and Succession in Relation to the Plant Covering . 423 
Table I ( continued ). 
Laboratory. Ridge D. 
Sample No. 
Young Dunes J. and G. Series . 
p,H. 
Loss on 
ignition. 
% 
Total 
carbonates. 
D. 1 
Tortula I'uraliformis and Cladonia 
6.9 
/o 
0.56 
/o 
°.°5 
D. 2 
Highest part of 
6.9 
— 
— 
D -3 
6.9 
— 
— 
D. 4 
r> r> 
6-8 
— ' 
— 
D .5 
» >> 
6.9 
— 
D. 6 
6.8 
— 
— 
D. 7 
122 yds. along ridge D 
6.95 
0.46 
0.15 
D. 8 
Psamma dom. 
6.80 
o -39 
0.64 
D. 12 
Side of ‘ blow-out ’, Psamma dom. 0-4 in. 
6.8 
0-30 
0.34 
D. 11 
,, ,, ,, 12 in. 
6.9 
— 
— 
D. 10 
„ ,, „ 24 m. 
6.95 
— 
— 
D. 9 
„ „ 36 m. 
6.9 
— 
— j 
D. 13 
Ridge D. near Lifeboat House 0-4 in. 
6.9 
0-40 
0.09 
D. 14 
,, ,, ,, 4-8 in. 
7.0 
— 
0.12 
D.15 
Tortula- Psamma near Lab. 0-4 in. 
6.9 
— 
— 
D. 16 
„ „ 4 - 8 in. 
6.9 
— 
— 
D. 17 
,, another locality 0-4 in. 
6.9 
o -53 
0.05 
D. 18 
„ 4-8 in. 
7 -i 
°*35 
0.05 
D. 19 
Crest, 0-4 in. 
6.9 
— 
— 
D. 39 
Tortula dom., Cladonia 
0.58 
0.03 
D. 40 
Brachytheciu m albicans 
7.0 
0.44 
O-1 1 
D. 36 
Tortula ruraliformis 
7-3 
0.67 
— 
D -37 
>> )> 
7.0 
0.69 
0.16 
D. 38 
5 > 
7.0 
0.70 
D.44 
Dense Cladonia and Hypnum 0-1 in. 
5-6 
— 
— 
£>• 45 
,, ,, j, i—6 in. 
6.7 
— 
— 
D -43 
Brachythecuun albicans dom. 
— 
0.76 
0.07 
p. H., 5-6-7. 
1 ; av., 6.908. Loss on ignition, 0.3-0.76 % ; 
av., c.525 %. 
Carbonates, 
03-064 % ; 
C. 20 
Cladonia dom. 
av., 0.155%. 
Ridge C. 
0-1 in. 
6.8 
0-00 
C. 21 
>> 
3 in. 
6.9 
— 
* — 
C. 22 
>5 
>> . 
6 in. 
7.0 
1 - — 
— 
C. 23 
5 j 
j? 
9 in. 
7 *° 
— 
— 
C. 24 
>} 
near 
C. 20 o— 1 in. 
6.0 
— 
— 
C. 25 
» 
dom. 
3 in. 
6.9 

— 
C. 26 
>» 
}} 
6 in. 
6.9 
— 
— 
C.27 
} j 
>> 
9 in. 
6.9 
— 
— 
C. 28 
}> 
}} 
0-1 in. 
6.4 
— 
— 
C. 29 
)) 
j? 
3 in. 
6.9 
— 
— 
C. 30 
„ 
6 in. 
6.9 
— 
— 
C. 31 
>> 
9 in. 
6.9 
— 
— 
C. 32 
)} 
V 
0— 1 in. 
6.9 
— 
— 
c. 33 
)} 
3 in. 
7 -i 
— 
— 
C. 34 
J? 
6 in. * 
l ’ 1 
— 
— 
C -35 
)} 
„ 
9 in. 
7 ,r 
— 
— 
C. 40 
)} 
>} 
0-4 in. 
6-8 
— 
0-00 
C. 41 
5? 
0-4 in. 
— 
0-82 
°-°5 
C. 42 
5 ? 
0-4 in. 
— 
0 
ON 
6 
0.07 
C.46 
Soldanella dune with freshly-blown sand 
7 - 1 
— 
o -33 
C.47 
j } 
7 - 1 
— 
o -37 
p. H., 6-0-7. 1 ; av. 6-89; av organic, o-86 %. Carbonates, 0.00-0.37% ; av. carbonates 
(4 samples excluding C. 46 and C. 47 where accretion occurs), 0.03 %. 
