580 
MESSES. LOCKYEE AND SEABEOKE ON 
5168-5 violently bent towards the red. 4859-1 Fe intensely 
black and thick. F very black, and bent in all directions over the 
region between the spots on the limb ; it was perhaps rather 
thickened, but I could not be certain of this. 
C T 
C and F presented the above appearance on the limb near the spot. Once the bright 
part of F filled up the space between 4859-1 Fe and the dark F line. This was pro- 
bably only half the bright part, but I did not see it on the other side. 
Another spot was close to the one in question, a little to the N. and E. of it. 
London. 
110 ° 
March 8, 1873. 
March 12th. — The bright line on the most refrangible side of b 
in the ordinary solar spectrum scarcely affected by the spot ; b not 
thickened. C gone on the edge of the spot ; F like this : — 
March 17th. — A group of spots, probably those seen on the limb 
on the 8th and on the sun on the 12th ; the magnesium lines were 
not thickened. D is very thick, and C very black ; but it is doubtful 
if it is thickened. The continuous absorption of the spot on either 
side of C is very small. 
March 24th. — The prominence at 230° changed a good deal in form and brilliancy. 
Two spots were seen, but no satisfactory observations were obtained. One of them 
seemed to give a continuous absorption only. 
March 25th. — Chromosphere like the edge of a grass plot, about 15" high ; a spot 
near N.E. limb. The following observations were made : — 
F, 457’0. 
Y 
Magnesium lines not much affected. 
Calcium „ near D not much affected. 
„ „ in red moderately thick, but certainly not in 
the same state of motion as the sodium ; scarcely any, in fact. 
Hydrogen thin and scarcely disturbed. 
