448 



Mr. J. Norman Lockyer. 

 Special Lines in a Persei. 



a Persei 

 (Scheiner), 

 A Potsdani. 



4290 

 4306 

 4310 

 4313 

 4321 

 4331 

 4344 

 4375 

 4387 

 4391 

 4394 

 4400 -0 

 4411 

 4413 

 4416 

 4450 

 4461 

 4464 

 4468 

 4471 

 4473 

 4481 

 4488 

 4491 

 4501 

 4508 

 4515 

 4520 

 4534 

 4545 

 4549 

 4564 

 4572 



2 

 3 

 1 

 4 

 4 

 

 7 

 2 

 2 

 4 

 4 



4400' 

 1 

 6 

 9 

 7 

 7 

 7 

 7 

 1 

 1 

 6 

 6 

 8 

 5 

 5 

 6 

 6 

 4 

 3 

 9 

 1 

 



8 Cephei 

 (Lockyer), 

 A Rowland. 

 Maximum 

 intensity = 10. 



4290 -7 (8) 

 4306 -4 (5) 



4313' 3 (4) 

 ? 



4331 -1 (6) 

 4344 -5 (5) 

 4375 -0 (10) 

 p 



4391 : 4 (5) 

 4394 -4 (6) 

 Broad line (8) 

 4411 -0 (4) 

 4413 '6 (1) 



4451 -1 (5) 

 4462 -0 (5) 

 4465 -0 (2) 

 4468 -4 (6) 

 4471 'I (3) 

 4473 -1 (3) 

 4481 -3 (7) 

 4489 '3 (5) 

 4492 -0 (3) 

 4501-5 (7) 

 4508*5 (5) 

 4515 -6 (6) 

 4520-5 (3) 

 4534 -3 (7) 

 4545 -3 (6) 

 4549*9 (7) 

 4564 -1 (4) 

 4572-0 (5) 



a Cygm 

 (Lockyer), 

 A Rowland 

 Maximum 

 intensity = 10. 



4290-7 



P 



(4) 



4313 -3 

 4321-3 (2) 

 4331-1 (2) 

 4344 -5 (2) 

 4375 -0 (2) 



4400 -0 (4) 



4417 *4 (7) 

 4451 -1 (4) 



4468 -4 (5) 

 4471 -0 (2) 

 4473-1 (2) 

 4481 '3 (9) 

 4489*3 (4) 

 4492-0 (4) 

 4501-5 (4) 

 4508 '5 (6) 

 4515-6 (6) 

 4520 -5 (6) 

 4534 -3 (6) 

 4545 -5 (1) 

 4549 -9 (8) 

 4564 -1 (5) 

 4572 -0 (5) 



Remarks on a Persei 

 (Scheiner). 



Stronger than in sun. 



» j> 

 No corresponding solar line. 

 Stronger than in sun. 

 Much stronger than in sun. 

 Stronger than in sun. 



Much stronger than in sun. 

 Stronger than in sun. 



No solar line. 



Stronger than in sun. 



No solar line. 

 Stronger than in sun. 



Much stronger than in sun. 

 Stronger than in sun. 

 Much stronger than in sun. 

 Stronger than in sun. 



Dr. Schemer also remarks on a few of the special lines of a Ursa? 

 Minoris, another member of the c Cephei class. My own photo- 

 graphs show almost absolute identity with <5 Cephei, so that a special 

 discussion of this star would be superfluous. 



It will be seen that the special lines of a. Persei are nearly all 

 present in h Cephei and a Cygni, and that they are all either faint in, 

 or absent from, the solar spectrum. 



The spectrum of 8 Cephei has been investigated by Belopolsky,* 

 and he gives a table showing that it differs in many respects from 

 that of the sun. Attention is specially drawn by him to some of the 



* ' Ast. Nach.,' No. 3338, p. 19. 



