340 
THE SOLAR STEP in SPECTROSCOPY, TOUCHING POSSIBLE SOLAR SURFACE TEMPERATURE. — 
PROFESSOR PIAZZI SMYTH ON 
SPECTRUM PLACE. 
Colour. 
VIOLET-END. 
Ultra-Red. 
Amber. 
Yellow. 
CITRON. 
Blue. 
Indigo. 
VIOLET. 
Lavender. 
Wave-NoMBER 
per British Inch. 
25000 te 26000 
26 27 
27 28 
28 29 
29000 30000 
30000-to 31000 
31 32 
32 33 
33 34 
34000 35000 
35000 to 36000 
36 37 
37 38 
38 39 
39000 40000 
40000 to 41000 
41 42 
42 43 
43 44 
44000 45000 
45000 to 46000 
46 47 
47 48 
48 49 
49000 50000 
50000 to 51000 
51 52 
52 53 
53 54 
54000 55000 
55000 to 56000 
56 57 
57 58 
58 59 
59000 60000 
60000 to 61000 
61 62 
62 63 
63 64 
64000 65000 
65000 to 66000 
66 67 
67 68 
68 69 
69000 70000 
Totals, 
ANGSTROM'S Norma Sonar 
SPECTRUM AS OBSERVED. 
Chief Lines. 
Supplied (1) 
Do. (1) 
* Do. 
OWES i=) 
moO ONT 
on 
o DBDAATA 
All. 
Supplied (3) 
Do. (10) 
Do. (3) 
Do. (30) 
16 
12 
22 
10 
21 
39 
1410 
LISBON 
SoLaR 
SpecTRUM 
AS 
OBSERVED. 
Chief 
Lines All. 
| SroOaS SQonr Lol 
i 
Cor orn or oOMmacmd wWwnwmor 
222/2019 
RED -END, 
MIDDLE OF SPECTRUM. 
VIOLET-END. 
ANGSTROM'S 
N.S.S., Reduced 
to a Uniform 
Total of 1000, 
Chief All. |Mean 3 
Lines 
a Uniform Total 
LISBON S.S. 
Reduced to 
bo 
bo 
SorRONTO Son ocoOF we 
_———— eee 
