phere which surrounds the ais in this case 
) refracted the sun’s rays a focus at some 
n, and in this process Piheest them into_ 
Parvin... ial thee having crossed at the focal point, " 
er in cee been expected, the red or least refrangible ray ¢ 
of the disk, surrounded in the, 0a order of refeege 
v and green; but in no part either of the 
lors 
‘ion; i 
not one of ithe observers has mention 
blue’ tints, while “ ay: 
althou 2a 
— ree comie o my recolle 
never heeded. It is this, that in looking at one of the plan- 
ot nal i siar within a few degrees of the horizon,with a reflector 
or well corrected achromatic, the object is tinged with prismatic a 
red, orange, yellow and green being very bright, while the others 
are ot as in the case of the lunar weli ipse. [am unable to suggest 
any mode of accounting for these sbeneaiaila which is exempt from 
strong ‘alijectieahdlam the most obvious are the following. -The violet, in- 
digo and blue rays being much the most refrangible, may be lost by 
hrown so far from the umbra of the earth, as to be unseen i 
the brilliancy of that part-of the moon, which réceives the full splendor 
’ the sun; this would be the. case with the ae ~ ray, which 
y ec interval be- 
wuld be we isnot the circle 
he penumbra ; this would not be the ease however, with the indigo. 
and si ‘i with the’ blue, whieh | » would (if it occupied its proper 
_— it = the red, and arpa: woul 2. 
range, yellow and green; in conse- 
quence of which sh@imecions are apt ea while the others are ab- 
sorbed: the same Cause may operate to impart to the heavenly bodies, 
- 
tion, if it existed. The >tdediieds to this theory, is the blue vast above 
