8 LIEUT. W. ROBERTSON’S OBSERVATIONS OF THE SECOND COMET OF 1822. 
or 6th magnitude near it, with which it formed a right-angled triangle ; the 
right angle at the northernmost of the two stars, and the comet to the westward. 
June 10th. Observed Encke’s comet after sunset. It has increased its iR. 
The stars seen along with it on the 7th are not now in the field of view of the 
telescope at the same time with the comet. 
June 12th. Observed Encke’s comet after sunset. It was very faint. No 
stars that we have in our catalogues (which are very limited) in the field of 
the telescope. 
June 13th. Observed Encke’s comet forming an angle of about 100° at 
jS Canis Minoris, with Procvon ; at about once and a quarter the distance from 
(3 Canis Minoris, that (3 is from Procyon. It is not brighter than when it was 
first seen. 
June 17th. Encke’s comet again seen. Aline drawn from Sirius to (3 Canis 
Minoris cuts a star of the 3rd or 4th magnitude: about ^th of the distance from 
that star to Procyon, was the comet, in a triangle formed by three stars of the 
5th or 6th magnitude, seen by the telescope thus, v_ , the M being 
$ * 
about 103°, and declination 5° north, and it has still the same nebulous, 
orbicular appearance as when first seen. 
June 18th. Saw Encke’s comet after sunset — very faint. It had increased 
its iR considerably since last night, from the small stars seen last night in the 
field of the telescope. 
June 19th. Hazy, and the direction of the comet not seen. 
June 20th and 21st. Thick weather ; comet not seen. 
June 22nd. Fine clear moonlight ; Encke’s comet could not be made out, 
nor was it again seen. 
If you think any of these observations likely to interest the Royal Society, 
I request you will do me the honour to present them. 
