Appendix. 315 
rapid in its movement. It was of quite an ordinary type as seen 
nearly every night. When it moved towards the west the disturb- 
ance appeared to be greatest. At times when the Aurora was 
fairly strong, but concentrated near the magnetic north, the needle 
was but little disturbed, nor did it appear to be much disturbed when 
the Aurora became diffused. 
May 6th, 1899. Short Extract from Meteorological Journal :— 
“Very fine Aurora Australis, first visible at 6 р.м. in the form 
of an arc of light in the north. The centre of the arc was about 
3° above the horizon, and bore about N. by E. The arc was of 
large radius, the inner side or base being of much greater intensity 
than the outer; much yellow and red in the base part. Curtains 
of vertical beams of light, always parallel to the original arc, com- 
menced to move slowly and bodily towards the south. The lateral 
movement was very rapid, and always E. and W., and the bottom 
part of the beams denser and redder than the top. The curtains of 
light advanced no farther than about 15° north of the zenith, the 
limit in the east being the planet Jupiter, and in the west the star 
Sirius. As the curtain of light moved south, the original arc became 
diffused but stationary and had little movement. The display 
_ reached its greatest intensity about 6.30 P.M., and ended at 7 р.м. 
A kind of diffused afterglow remained in the north for many hours. 
Temperature of air, 12° F. ; barometer, 29:262 inches." 
August 4th, 1899. Short Extract from Meteorological Journal :— 
“An Aurora was observed at a little before 6 р.м. in the form cf 
a double luminous arc in the north. Тһе arcs were separated from 
one another by about 2^, the inner one being 8^ above the 
horizon. ‘The west extremity of the arc bore about N.N.W. The 
east extremity was invisible, being hidden behind the cape. The 
arcs lay in the same plane and had a common centre. Winding 
curtains of Aurora afterwards manifested themselves in the usual 
way, moving towards the zenith and forming coronas there. 
Temperature of air, — 41:5? F. ; barometer, 29'200 inches." 
