SOLAR ECLIPSE OF AUGUST 29, 1886. 
393 
naked-eye observations; but his head was wrapped in a black mackintosh 15 minutes 
before totality commenced. 
VERTEX VERTEX 
The black centre represents the Moon; the shaded circle in B represents the disk (three times 
size of Moon) which obscured the brighter portions of the corona. 
Long, of station, 4h. 6m. 30s. W.; lat. 12° 8''5 N. 
No attempt is made in either drawing to give details, but merely the distances to 
which coronal extension could be traced, as estimated in diameters of the central black 
disk, which in tlie first case represents the Moon, and in the second a disk which was 
so placed as to screen the brighter portions of the inner corona from the observer’s 
eyes, and subtended an angle of 3 diameters. It will be seen that the chief dis¬ 
crepancy in the drawings is in the orientation of the rays marked respectively a and h, 
in one of which there would seem to be some error; otherwise the correspondence is 
remarkably good, except that Lieutenant Smite obviously traced the extension much 
further than Mr. St. George. It may be mentioned that special rehearsals were 
conducted on the two days before the eclipse, in drawing on such skeleton forms of 
concentric circles pictures of coronae held before the eye for 3|- minutes. The two 
gentlemen mentioned above were found to reproduce the direction of the rays very 
accurately, and, as regards distance, Mr. St. George seemed to be liable to slightly 
over-estimate the extensions. 
3 E 
MDCCCLXXXIX.—A. 
