.
The maximum of these lines is difficult to determine; they are not well placed for measurement, many of the most important are seriously blended, and all are rather faint, even at maximum. They are first seen[292] at Class
, and their maximum appears to be[293] at
or
.
The solar intensities of the lines of both neutral and ionized titanium fall off regularly with increasing excitation potential. The subject is discussed in [Chapter VII], as part of the evidence for the validity of the Saha theory.[294]