234 
W. F. Cole. 
TABLE I.— INTERPLAXAB SPACIXGS OF THREE SAMIM.ES AND ASSIGNED ORIGINS. (UPPER 
FILTERED Fe 
Upper Greensand. 
Subsoil. 
61 and less. 
2 ^ and less. 
61 and less. 
Unheated. 
Unheated. 
Heated 500=C. 
Unheated. 
Heated 500°C. 
Pos- 
Pos- 
Pos- 
Pos- 
Pos- 
sible 
sible 
sible 
sible 
Slide 
1 
Origin. 
I. 
d . n. 
Origin. 
I. 
d/n. 
Origin. 
1. 
d/n. 
Origin. 
1. 
d/n. 
Origin. 
T. 
d/n. 
(il) 
? 
■.> 
(H) 
y 
13-95 
ms 
15-0* 
U 
y 
12-75 
G 
s 
10-12* 
G 
y 
0-43 
G(M) 
s 
10-12 
G 
A'W 
9-56* 
GM 
m 
10-02 
.K 
vw 
7-20 
U 
w 
5 • 43 
U 
vw 
5-47 
G 
in 
4-94 
G 
VW 
4-99 
(JM 
vw 
4-93 
G(M) 
r 
4-50 
G(IVI) 
s r 
4-48 
G(M) 
m 
4 - 45 
GM 
r 
4 • 53 
GM 
w-m 
4-47 
QGo 
4 •26 
-...s' 
QGo 
ms/ 
4-21 
Q 
= J 
4-20 
Cg 
1 
4-09t 
Cg 
m(d) L 
4-12 
Cg 
vw 
4-18 
Cg 
L 
4-07 
Cg 
n 
4-07 
.... f 
3-80 
GCg 
ms 
3 • 69 
GCg 
vw 
3 65 
Cgf.T 
VV' 
3-70 
G('g 
m/ 
3-68 
s 
3-34 
QG 
w 
3-34 
QG 
m 
3-33 
QG 
y 
s'- 34 
Q(J 
.... t 
s 
3-34 
G 
w(d) 
3-08J 
G 
vw 
3 • 09 
G 
W 
3-07J 
O 
w 
2-<)7. 
G 
AW 
2-95'! 
GM 
VW 
2-97:i 
G 
w 
2-84 
HGoG 
vvv 
2-73 
<i(H) 
y 
2-69 
G(H) 
s 
2 ■ .58 
G(ll) 
s 
2 ■ 58 
G(3l) 
in 
2-58 
GM 
in 
2 ■ 57 
GM 
r 
2-58 
m(d)/ 
OtxO 
/ 
2 • 45 
QGo 
w 
2-45 
Q 
L 
2-444 
G 
m\ 
§2-414 
G 
m(d} 
2-409 
G 
w 
2-394 
Q 
.... ^ 
2 • 28 
Q 
vw 
2-271 
Q 
vv 
2-275 
G 
vw^ 
§2-241 
G 
y 
2-237 
Q 
L 
2 - 22 
Q 
y 
2-216 
Q 
vw 
2-228 
Q 
w 
1 2 
GQ 
vw 
2-119 
GQ 
vw 
2 Il9 
GQ 
vv 
2-120 
GO 
vw 
J - 988 
GQ 
vvv 
1-975 
GO 
\V' 
1-970 
U 
y 
1 -887 
U 
vw 
1-010 
Q 
m 
1-814 
Q 
w 
1-814 
in 
1-814 
U 
vw 
1 -74i) 
G 
w 
1 -710 
G 
vw^d) 
1-715 
GM 
vvv 
1 ■ 700 
GM 
r 
1-608 
vv(d)/ 
OG 
m • 
1 -659 
QG 
vw(d) 
1-645 
QG 
vw 
1-667 
GQ 
L 
1 ■ 665 
G 
vw 
1 • 608 
G 
vw 
1-57] 
Q 
w 
1 • 538 
Q 
w 
1 - 538 
Q 
m 
1 • 538 
C(-M) 
ms 
1 -510 
G(M) 
m 
1-511 
G(M) 
w 
1 ■ 505 
GM 
w 
1 • .507 
GM 
vvv 
1-515 
QG 
vw 
1-451 
QG 
y 
1 - 4.52 
QG 
vw 
3 - 450 
Q(i 
vw 
I - 447 
Q(} 
vw 
1-447 
QG 
vw 
1-422 
QG 
y 
1 -415 
QG 
vw 
1 - 409 
QG 
m 
1 -376 
QG 
vvv 
1-372 
QG 
w 
1-374 
QG 
m 
1 -374 
G 
w 
1-305 
G 
r 
1-303 
(i 
vw 
1-298 
G 
vvv 
1-307 
G 
vvv 
1-316 
w<i 
GO 
vw 
1 -288 
GQ 
L 
1-283 
GMQ 
vvv 
1 -288 
G.MQ 
vw 
1 -288 
OG 
w 
1-256 
QG 
vw 
1-254 
GMQ 
vvv 
1 -253 
GMO 
vv 
1-257 
Q 
y 
1 -227 
Q 
vw 
1 -227 
QG 
w 
1 • 199 
QG 
vvv 
1-196 
QG 
w 
1-199 
Q 
vw 
1-181 
Q 
vw 
1 - 180 
Q 
w 
1 -180 
s = strong : lus medium strong : m * medium : w = weaL : v\v = ^'ery weak : d = diffuse. 
G = Glauconite : - (Quartz ; M - Moiitmorillonite ; K = Ivaoiinite : Go = Goetldte ; H = Haema- 
tite ; Cg = Candle grease. 
* Estimates of'_<i n made on films taken with Cu radiation. 
t Centre of a line nnsymmetrica) in intensity which on its inner edge has a diffuse region extending to the 
line at 4.51) A and within this diffuse region a faint quartz line occurs at 4. *20 A. 
