250 W. A. Norton on the Corona seen in Eclipses of the Sun. 
ART. seraednie’ the Corona seen in Total ane of the Sun; 
by Professor W. A. Nort 
CERTAIN observations made on the total eclipse of the sun 
of August 7, 1869, have led some of the observers to the con- 
hn that the freer seen on that occasion, rae in previous 
is of the nature of a Solar Aurora. meshes that 
it ne ae be catiodg sre that this theory is sina a one. 
It has been advocate several years by the widhior “of the 
present communication, ‘both 4 in publications and in public lec- 
tures. It is essentially involved in the explanation of the 
Zodiacal Light, propounded in his Treatise on Astronomy, 2nd 
edit. (1845); and in the — views set forth in a note 
ee to — ee ae of the topic of Terrestrial Magnet- 
na memoir on Molecular Physics, published in this Jour- 
mt (1864-6), * "Tt is distinctly presented in the last edition of 
the Treatise on Astronomy (1867), pp. 172, 174, 175, and 178. 
ropose, in a communication to the next No. of this Journal, 
of 1869, and of those of other observers of that and prebiots 
total alitnine bie lend a powerful support to the auroral 
theory of the ¢ 
This stitroeinetory? notice is now published mainly with the 
view of calling, at an early day, the attention of astronomers 
who may observe the eclipse of December next, to the me 
tance of noting the exact positions, with a to the oan of 
e cor- 
rof. Capelotti of observations on the eclipse of April 15, 
1865, made at Chili, shows the same to have re, the case in 
that eclipse. The delineations of the corona as seen in other 
win t 
is to be hoped that shianiene of sabenpient eclipses will ii take 
the precaution to ascertain these positions, and note them in 
their Reports. If they really have any general uniformity, in 
different eclipses, the fact aa fail to throw light on the ori- 
gin and nature of the c 
* See this Journal, vol. xli, No. 121, pp. 76, 77. 
