Notes on the Aspect of Mars in 1882. 305 
Hourly change of \=14°°61 nearly. 
1881. December 8, Spring Benno \ of Mars’ Northern Hemisphere. 
1882. June 25, Summer Solstice 
The data for the above have been taken from Mr. Marth’s Ephemeris for Physical 
Observations of Mars in 1881-2, published in the Astronomische Nachrichten. 
June 19, 1882. 
ADDENDUM. 
Dr. Terby, of Louvain, has kindly pointed out an erratum in my paper on Mars 
(these Transactions, antea Pt. XII., page 151), that the light streak in Fig. 12, 
Plate vi., is probably Atlantis I. a permanent feature. The longitude of the central 
meridian for the epochs of Figs. 12, 14, and 15, Plates vi. and vur., should respectively 
be increased by 16°, when they will stand thus :— 
Fig. 12. Longitude, .. ‘ . : 5 ule 
Sa - ee ee 4.) 165° 
> ee i re eeitye 
TRANS, ROY. DUB. SOC., N.S , VOL. I. 3 KE 
