66 J. H. Lane on the Theoretical Temperature of the Sun. 
bination, and assume further that the sun’s zenith distance did 
not exceed 48° in the experiments made with it, we find for the 
Eton multiplier oe the part of the sun’s heat r — 
arrived at the focus unintercepted, (4)'1*(7P= 55 
Hence the radiation rH received by a small flat surface at 
the focus was ‘09, or about one-eleventh, of what it wo 
, while the true a of the sun’s image pani be not 
ee s than one-third of an inch. 
niectu allowan ce of $ths in all, Se likely, pura to be much 
too large. Not much reliance, i ean be placed the formula here men 
