726  Prof.  H.  Becquerel  on  some  Properties  of 
I 
experiment 
A.  17/11/1905.— 
■a=ll-65 
mm.  ;  k 
=  0-937; 
H= 12,148. 
In  A 
IR  ONLY. 
Through  Aluminium. 
ed-- 
=111 
ed-- 
=  1-39 
8= 1-7248 
2^ 
(* 
A 
2=  1-9334 
(n+e)8 
n. 
(observed). 
observed 
.  calculated. 
(observed). 
observed 
.  calculated 
3... 
92-4 
6-26 
6-28 
143-9 
913 
913 
4... 
...       1341 
8-50 
8-01 
188-1 
11-22 
11-06 
5... 
...       166-3 
992 
9-73 
233-2 
1313 
12-99 
6... 
...       205-9 
11-59 
11-46 
285-1 
1519 
14-93 
7... 
..       252-1 
13-44 
13-18 
333-2 
16-86 
16-86 
8... 
...       294-6 
14-91 
14-91 
392-5 
1890 
18-79 
9... 
..      343-8 
1655 
1663 
451-4 
20-74 
20-73 
10... 
..       395-2 
18-16 
18-35 
515-7 
22-65 
22-66 
11... 
..       456-7 
20-06 
20-08 
584-1 
24-56 
24-59 
12... 
.-.       519-2 
2185 
21-81 
660-4 
26-66 
26-53 
13... 
..      576-4 
23-27 
23-5:5 
724-1 
28-10 
28-46 
14... 
..       644-3 
2501 
25-25 
790-0 
29-52 
30-39 
15... 
722*2 
2698 
26-98 
888-7 
32-01 
32-32 
16... 
..       791-3 
28-50 
28-70 
985-2 
34-26 
34-26 
17.... 
..       872-6 
30-34 
30-43 
18... 
..      950-8 
31-94 
3215 
19.... 
..     1034-5 
33-62 
33-88 
20.... 
..     1131-3 
35-61 
35  60 
21.... 
..     1233-3 
3763 
37-33 
22.... 
.      1318-7 
39-05 
39-05 
23.... 
..     1437-0 
41-24 
40-78 
E 
xperiment 
A.  16/11/1905.- 
a  =  25*15 
mm.;  k 
=  0-920 
H  =  12, 
L48. 
InAi 
It  ONLY. 
Through  Alumi 
NIUM. 
eS  = 
=  0-70 
eS= 
0-84 
S=  1-7318 
(» 
+  e)o 
8= 1-9037 
2v 
(n+e)8 
r 
\ 
r 
-\ 
n. 
(observed.) 
observed. 
calculated. 
observed. 
observed. 
calculated. 
1.... 
72-9 
2-55 
243 
810 
283 
2-75 
2.... 
..       118-3 
3-99 
4-17 
137-8 
4-65 
4-65 
3.... 
..       1820 
5-94 
590 
204-3 
6-67 
655 
4.... 
..       233-9 
740 
7-63 
268-9 
8  50 
8-46 
5.... 
..       305-4 
9-36 
9-36 
3361 
1030 
10-36 
6.... 
..       371-8 
11-06 
1109 
412-4 
12-26 
12-26 
7-... 
..       440  3 
12-75 
12-83 
436-5 
1405 
1417 
8.... 
..       5166 
14-50 
14-56 
551-7 
15-49 
16-07 
9.... 
..       598-4 
16-34 
1629 
10.... 
..       678-0 
18  02 
18-02 
11.... 
.       769-8 
19-93 
19-76 
12.... 
.       842-7 
21-27 
21-49 
Experiment  A.   18/6/1903.— a  =  20'4  mm.;    k  =  0*983  ; 
H  =  9955.     Air  only. 
71  = 
o 
3 
4 
5         6 
7     :    8 
9 
10 
11 
8= 1-6808  ;2*(obs.)  = 
101-0 
141-2 
1931 
245-7  291-9 
357-0 
417-6 
483-2 
550-2 
624-5 
e^=l-07  {    observed = 
4-44 
5-94 
7-80 
9-54 !  10-91 
12-86 
14-52 
16-24 
17-88 
19-67 
(?i  +  e)S    [  calculated  = 
4-44 
6-12 
7-80 
9-48   11-16 
1 
12-84 
14-52 
1620 
17-88 
19-57 
