THE SPECTRUM OF NOVA PERSEI AND THE STRUCTURE OF ITS BANDS. 275 
Taste XI.—Photographic Plates, 1901 August to 1903 February. 
3 Number of a £ 
gs 3 os) 5 | Points Measured.| ‘3 = 
ca B &p g Definition. | eB 3 
Bs : | oe E | 2 
Z - Date. FS} oF Remarks. = 5 
ql bs Star. | Fe, Ti. A E 
Degree s 
Hours, Gat oral, Star. Fe. 2 S 
Se 1901. Aug. 1 Were 0°5 4 3 Intensified 35 25 4 6 
9 Aug. 15 4:0 2°0 2 2 Intensified 93 24 15 8 
10 Aug, 21 6°5 29 2 9) 98 32 14 6 
iby Aug. 26 5'8 18 2 2, 109 40 18 4 
12 Aug. 27 5'9 15 3 3 Intensified Cel 24 10 3 
13 Aug. 30 4:3 18 2 2 Intensified 94 25 14 4 
14 Sept. 4 Cer 1:9 2 2 Very clear | 114 33 20 4 
15 Sept. 20 4:7 0-2 4 3 Intensified 49 17 5 2 
16 Octam2 37 3°0 4F 3 Intensified 45 25 2 2 
Oct. 4 1:9 
17 Oct. 6 7:0 18} 2 2 Intensified | 108 40 15 4 
18 Oct. 31 8°5 he 2 2 64 30 12 4 
19 Nov. 1 6:0 0-2 2 2 ali 36 1B 4 
20 | 1901. Nov. 13 5:5 0°5 Y 2 Intensified | 133 45 17 4 
21 1902. Jan. 12 58 11 2 1 Intensified 87 50 5 4 
22 Jan. 26 16 0:7 F 2 Intensitied 77 45 2 4 
Jan. 28 6:3 
23 Jan. 29 76 2:2 F 1 Intensified 80 35 1 4 
Jan. 31 76 
24 Feb. 9 4'8 2:0 FE 2 Intensified 81 42 4 4 
Feb. 11 4:8 
Feb. 12 4:3 
Mar. 21 2:0 
25 April 1 2°6 5:0 vF 1 Intensified 78 52 2 4 
April 2 18 | 
April 17 1:5 
April 26 Nery 
April 30 0:8 
May 1 0-9 
May 2 1:4 
26 Oct. 20 Y) 3°3 F 2 Intensified 98 48 3 4 
Oct. 26 9:0 
Oct. 30 3:3 
Noy. 1 8°5 
27 Nov. 17 6:7 17 vF 1 Intensified 46 32 % 4 
Nov. 18 6:7 
Nov. 20 6:9 
1902. Nov. 21 2:2 
1903. Jan. 7 0:5 
Jan, 24 0:5 
Feb. 1 0°5 
| 
Width of slit:—0-018 mm. for plates Nos. 8 to 25; 0-020 mm. for plate No. 26; and 0-022 mm. for 
No. 27. : 
_ Angle of inclination of plate :— 13° for Nos. 8 to 17; 16° for Nos. 20, 22, 23, 25; 30° for Nos. 18, 19, 
21, 24, 26; 8° for No. 27. 
Definition :—1 excellent, 4 inferior, F faint. 
TRANS. ROY. SOC. EDIN., VOL. XLI. PART II. (NO. 10). 42 
