ABSORPTION SPECTRA. 373 
Relative thickness of layer in millimeters of 1/10,000 molar solution. 
4,000 
400 
4/67 
2400 
IB4E 
2600 
3572 
2800 
8333 
3009 
3125 
32090 
294/ 
3400 
2778 
3600 
263/ 
3800 
2500 
4000 
238/ 
4200 
2273 
4400 
KK 
SHSM One ear SETS) NS LS: ha oN es 
NEBL ry fans OSLO TUF CIM al CD Te CUM ICT NEL UWL ie CON, ot CU). (a MINOT (INE ONS 
Logarithms of relative thickness in millimeters of 1/10,000 molar solution. 
. 
Fic. 1.—P-nitrophenol—full curve. P-nitrophenol with 1/10 equivalent of sodium ethoxide= 
dot curve. P-nitrophenol with 4 equivalent of sodium ethoxide=dot and dash curve. 
P-nitrophenol with 1 equivalent of sodium ethoxide=dash curve. 
