2 7S Dr. Herschei/s Observations to investigate 
irregularly breaking out from the passage, towards the southern 
half of the opening. 
Dec. 28, 1799. The opening is so completely vanished, that 
I cannot find the least mark of its former existence. From the 
appearance of the branch yesterday, in the luminous division 
resembling a bridge thrown over a cave, I surmise that this 
branch, as well as the sides of what I call the bridge, have 
extended themselves, and as it were drawn a lucid curtain over 
the opaque surface of the sun. 
Decaying Openings sometimes increase again. 
Feb. 8, 1801. The great opening, which has been gradually 
diminishing since Feb. 4, is now enlarged again. 
When Openings are divided , they grow less, and vanish . 
Dec. 29, 1 799. The south preceding of two openings observed 
yesterday is divided into three small ones. 
Dec. 31, 1799* The divided opening of the 29th exists no 
longer. 
Feb. 9, 1800. Of two considerable openings observed Feb. 7, 
the preceding one is divided into several smaller parts. 
Feb. 10, 1800. The divided opening observed yesterday is in 
a vanishing state. 
Feb. xi, 1800. The openings are all covered in, and no trace 
of them can be found. 
Decayed Openings sometimes become large Indentations. 
Feb. 9, 1800. The preceding of two openings observed the 
7th of February is now about half filled up; and that half con- 
tains two indentations, with black pores, or rather remaining 
