296 
Colour of the 
Continuous 
Spectrum at 
the Place. 
RED. 
Here begin the grand bands of fine lines before the great B line, of which we made three independent sets of observations 
on June 15 and 19, near Noon A.M., and p.M., with dispersions varying from 28° up to 50° (between A and H). 
PROFESSOR PIAZZI SMYTH ON 
Object Observed, generally a black, fixed 
Fraunhofer Line. 
Stronger fine line, double, been 
Ist line, 
2nd line, 
Stronger line, clean and sharp, . 
Fine line of band, : 
Do. do. 
Do. stronger, 
Stronger still, fine and sharp, 
Fine line, 
Do. 
Do. 
Stronger fine line and sharp, 
Fine line, : 
Stronger line, 
The step line before B’s preliminary 
band, : ; 
Wave-number places are a mean of the whole. 
Colour of the 
Continuous 
Spectrum at 
the Place. 
| 
RED. 
| 
Object Observed, generally a black, fixed 
Fraunhofer Line. 
The step line repeated, 
Very faint line, 
Preliminary band begins. 
First pair—lst component line, 
2nd do. do. 
Second pair—1st component line, 
2nd do. do. 
Third pair—ist component line, 
2nd do. do. 
Fourth pair—lst component line, , 
2nd do. do. 
Fifth pair—1st component line, 
2nd do. doy 
Sixth pair—1st component line, 
2nd do. do. 
Seventh pair—1st component line, 
2nd do. do, 
Kighth pair—1st component line 
2nd do. do. 
Ninth pair—1st component line, 
2nd do. do. 
eyed 
Intensity | ance by 
of Wladk, br graphical 
es ee 
orane. | symbol 
10) I] 
10 | | || 
: | 
1 | 
11055 
15 , iit 
oe 
0°6 
06 | 
07 | 
: | 
0°5 ‘ 
On | 
2 | | 
Appear- 
mga ance by 
of black, or| St@pbical 
thickness aoe 
of line. symbol. 
20 | | 
0-1 
0°5 | | 
0°5 | 
O7 |! Tl 
07 
10 |] diy | 
10 | ( 
goa 
15 if lly 
18 || 
vs |!) fll] 
2°0 | | | 
20 | | 
2°56 i | 
2°5 | 
2°5 | 
20 || 
20 | {ltt 
WAVE- 
NUMBER- 
PLACE of 
every line. 
36 663 
36 679 
PLACE- 
DATA, 
from 
Angstrom’s 
Grating Nor- 
mal Solar 
Spectrum, 
36 523 
36 565 
36 603 
36 663 
Differences 
of pairs. 
Chemical-origin- 
data from 
Angstrom, 
Thalen, &e. 
Telluric, 
Telluric. 
WAVE- 
NUMBER- 
PLACE of 
single lines, 
and Centres 
of doubles. 
36 663 
36 692 
36 719 
36 744 
| 36 770 
36 795 
36 817 
36 838 
36 858 
36 876 
Differences, 
Concluded — 
WAVE- 
NUMBER- 
PLACE, per 
British Inch. 
Breadths & 
Doubles. 
36 498 
36 502 
36 523 
36 532 
36 548 
36 560 
36 566 
36 578 
36 582 
36 596 
36 604 
36 618 
36 636 
36 663 
The following 
Differences, 
Telluric line 
31 
Telluric FL 
supposed 
27 dry gas, 
25 
26 
25 
22 
Tellurie hi 
supposes 
21 ry g0 
20 
18 
16 ; 
