2C)S Dr. Herschei/s Observations to investigate 
n h 53'. On the preceding side, more of the planetary clouds 
are advancing to draw themselves over the opening ; they are 
very faint. 
Feb. 7, 1801. Another passage is now thrown over the great 
opening, consisting evidently of the lower clouds. Perhaps a few 
clouds of the upper regions may be drawn upon it ; but, at both 
sides, the shallow continues to be visible from the bridge to its 
margin, or confinement by the surrounding self - luminous 
clouds. 
io h 40'. A third passage is beginning to come on from the 
following side, also consisting of lower clouds. It seems that 
the curtain will be closely drawn over the opening, before many 
of the self-luminous clouds can advance. 
Motion of the superior Clouds. 
Feb. 5, 1801. The large opening of Feb. 4, is in a diminishing 
state. Its shallow is contracted ; and, though it has no corru- 
gations, it seems as if a few self-luminous clouds of the upper 
regions were here and there scattered over it. I see their superior 
brightness, and their elevation above the shallow in the places 
where they are. 
i h 42'. More of the clouds of the upper regions have scattered 
themselves over the shallow ; and one of them faintly passes 
over part of the opening, almost across it. This will probably 
form a division. 
i h 5o'. There is an opposite cloud advancing to meet the 
former one; probably that part of the opening where they are, 
opposes less resistance than the rest. 
i h 53 *’ The shallow contracts very fast; the sides of the 
upper regions of clouds press on ; the borders become irregular. 
