*A difficult double.

†The red component, a difficult double.

§ The 1474 lines is a triplet, or rather a double, the red component of which has a weak side-line to the violet; probably the violet component is due to iron, and the weak line to cobalt, but the red is unknown.

18947-8

18957-3

18957-7

18958-1

18968-2

18968-3

18968-56

18971-16

A difficult triplet.

the arc the first line of the first head of the green carbon band.