a ot Gee 
= SHOWING THE LOSS OF INTENSITY IN ILLUMINATING Gas 
DUE TO ADMIXTURE: OF AIR, 
4 American Journal of Science 4 Arts, 2% Series, Vol. XLVI. No.1 48 s 
‘The numerals on the left: ‘indicate the loss of cig ob 
in per centage. 
a. Tumnteale, on the lower line are ie oe centa volumes of air 
