iS) 
on 
i) 
NATURE 
TABLE A.—IRON 
Lion Lines observed in Sunspot Spectra at Kensington among the 
most Widened Lincs 
3 
1884 
1885 
2nd HUNDRED, 
Sept. 29, 1880, to Oct. 15, 1881 
3rd HUNDRED, 
Oct. 18, 1881, to June 27, 1882 
4th HUNDRED, 
July 1, 1882, to August 28, 188 
5th HUNDRED, 
August 30, 1883, to June 23, 
6th HUNDRED, 
June 24, 1884, to Feb. 12, 1885 
7th HUNDRED, 
Feb. 18, 1885, to August 24, 
Ist HUNDRED, 
Noy. 12, 1879, to Sept. 29, 1880 
last observations now discussed were made. 
absence of all bias is secured. 
It may further be remarked that the number of lines widened 
throughout a sunspot period is about the same, so that the con- 
ditions of observation vary very little from month to month, and 
from year to year. 
It may be further remarked that the absolute uniformity of 
the results obtained in the case of each of the chemical elements 
investigated indicates, I think, that the observations have been 
thoroughly well made; and, as a matter of fact, they are not 
difficult. 
I first give tables (A, B, C) showing that for each of the 
In this way perfect 
TABLE B,—NICKEL 
List of most Widened Lines observed at Kensington 
MN DO HO MDOWO WMA Dna oo memo 
Lines NAMEN AMO FHOO HAO = Ninw 
OMOH MRD HEH MERA ADH Mt tMO Dm 
WDHEAANADNO OOOO O HF wt mt et et et et 
tet t tt tT OMMHMMMHMnMMnMnMMwH 
Ist hundred 
2nd hundred 
| 
3rd hundred | | 
| 
4th hundred | 
5th hundred | 
| 
6th hundred 
7th hundred 
TABLE C,—TITANIUM 
List of most Widened Lines observed at Kensington 
MANMOOMAWDMONMMTO MNHO MON 
Lines AtoteO MMM MO0 Nk THO DOO THs 
OD HODOHMMMMMNHOUO ROH ATT 
PW ANAGCCOOOOODOOOO DO O Ft wt et et et 
tet THT MMM MMMHMHMMMMHMHMHHNMMNMNYH 
ist hundred | | | | 
2nd hundred | | | | 
3rd hundred 
4th hundred 
5th hundred | 
6th hundred 
7th hundred No lines. 
chemical elements taken—iron, nickel, and titanium—the num- 
of lines seen in the aggregate in each hundred observations is 
reduced from minimum to maximum, and that this result holds 
good for both regions of the spectrum. 
I next give another table (D) showing that during the obser- 
| Fuly 15, 1886 
ingen yO a i es ee ee ty Wee em Se 
= wv 
ee | 
— es 
