ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS, 289 
FRAUNHOFER LINES 
1G 7604-0 
‘Bi. : 2 : : ‘ : 6867-0 
chem GED)": - - - “ : : . 6562-1 
Paap pluses 
D (Na) : ¢ - : - 5892-12 {5889-12 
E (Ca& Fe) - : : - . 526913 
By (ig). +: . : ; : : - 5183°10 
b, (Mg) ; ; : - - - . 5172716 
bs (Ni & Fe) : : : : . . 516848 
b, (Mg& Fe) . : : C ‘ - 516688 
F (BH) i : F : ; ; . 4860°72 
. G (Fe) : : : ; : : . 4307-25 
H (Ca) : ; : } A - . 3968-1 
K (Ca) : ; - , : : sodas: O 
y L (Fe) DS oh gece POE 8819'S 
M (Fe) : : 2 2 : - . 3727:0 
N (Fe) : ; : . 2 - . 3580°5 
O (Fe, double) . - ; 3 : . 3439°8 
P (Fe & Ti) : F 3 : : . 3359°2 
Q (Fe) : : : : : : . 3284°9 
R (Fe & Ca) : : ; - : . 3179-0 
r (Fe, double) . é : : . - 31443 
$, (Ni, double) . : : ; : . 3100°6 : 
Seva iiple) heweia aki 3099-5 ¥ 31000 
s (Fe) ; : : . ; : . 3046-4 
T (Fe, double) . , : : - . 3019-7 
t (Fe) : : : “ : . 2994-3 
U (Fe) ‘ : : : : - 29478 
The following symbols are employed in the tables to indicate the 
character of the lines : 
s denotes that the line is sharply defined. 
n denotes that the line is ill-defined or nebulous. 
b denotes a band, the position of the brightest part being given. 
br denotes a band sharply defined on the least refracted side, and fading away 
towards the blue. 
br denotes a band sharply defined on its more refracted side, and fading away 
towards the red. 
The widtk of a broad band is sometimes indicated by a suffiz, giving 
the width in ninth-metres; thus, 4997 b™; means that the bright edge of 
the band is the 4997, and that it fades away above 4947 ; whereas 6532 b, 
oe that the band extends from 6552 to 6512, its brightest point being 
at 6532. 
c denotes that the line is continuous. 
d denotes that the line is discontinuous, or a ‘short’ line. 
r denotes that the line is frequently ‘ reversed.’ 
A number within parentheses, thus: (3091:9), means that while a line in this 
position has been observed, no new measurements of wave-length was made 
—the wave-length being quoted from another observer. 
The intensities of the lines are expressed upon an ascending scale 
from 1 to 10; 1 being the feeblest and 10 the brightest. 
1885. U 
