52 Mr Bragg, The Diffraction of 
TABLE III. 
, 2 Aan? 
Planes for which u.c.M. of p and r=3, l= a , A= = 
p q r s ‘ Intensity hy hg hg 
1 1 3 5 3°6 Invisible a 3 
] 1 5) if 5:6 e 5) i 3 
1 1 3 IL 11:6 Invisible 5) at 3 
Bad wa S onli Mm Nina | 8 | 5 | = 
3 5 3 a 6-9 * 5 a 3 
3 5 3) 1 12°9 Invisible 5 iol 3 
3 7 5) 1 4:9 Invisible a 1 3 
3 a 3 5 6:9 x a 5 3 
3 0 3 7 8:9 = Gi a 3 
3 7 3 ial 14:9 Invisible a 11 5) 
1 3 3 1 7°6 % 9 1 3 
1 3 3 5 9-6 + 9 5 3 
il 3 3 a 11-6 Invisible 9 di 3 
Range of values of = HG) = OG. 
RABE Ve 
Planes for which the L.c.M. of p and r=4, l= = ; 
_ 4an? _ a 
= a. 
“rT 
p q r SG «| . Intensity hy lig hea 
1 il 4 10 8-2 Invisible 4 10 4 
1 IL 4 14 16:2 Invisible 4 14 4 
2 4 4 10 Ie i 8 10 4 
il 3 4 6 12:2 Invisible 12 6 4 
