92 
GIBBS, WILLIAMS, AND PRATT. 
TABLE VIII.—The action of sunlight upon various hydroxy benzene deri- 
vatives* in presence of air in sealed tubes. 
28, 1912. 
Condition on 
February 13, 1912. 
Put in sunlight on January 
Conductivity water was employed. 
aube Contents of tube. 
Salicylic acid 0.2 gram__-__-__- 
Aqueous layer reddish yellow. 
5C | Water 5 cc Caritas 
Carbon tetrachloride 2 ce ____ ei ea a | 
6C | Same as last, no CCla 
7 = ae 
M-hydroxy benzoic acid 0.2 
13C gram. Aqueous layer yellow. CCla 
Water 5 ce -_____------------- layer colorless. | 
Carbon tetrachloride 2 cc____- 
14C | Same as last, no CCl4____-_____ Yellow with red deposit______ | 
wae cnet = | DEE ex, 
Ethyl ester of m-hydroxy ! 
uc benzoic acid 0.2 gram. Aqueous layer colorless. 
Wiater/b\ces2 eases cee a aaeeee CCla yellow. | 
Carbon tetrachloride 2 ec | 
12'C || Same as dats no CCIE eee Yellow with aay drops of a 
dark-colored oil. | 
— ae | = = 
Methyl ester of m-hydroxy | Water colorless____-_-______._ 
15C benzoic acid 0.2 gram. CCls pale yellow___-_-------_- 
Water 5 cc Layer of red liquid between | 
Carbon tetrachloride 2 cc water and CCl. 
AE Gll\Sameasiast wolCClis meee Yellow a a few drops of 
dark red oil. 
P-hydroxy benzoic acid 0.2 | 
9C Sa Ds RMD dale hme 8 Practically no color____-----_- 
Carbon tetrachloride 2 cc____- 
10C | Same as last, no CCl4_---_-__- Practically no color___-------- 
Ethyl ester of p-hydroxy 
benzoic acid 0.2 gram. , | 
TC Practically no color_____-__._- 
iWiater!bices- santas see ee ‘ 
Carbon tetrachloride 2 cc____- 
8C | Same as last, no CCl4_________ @olorless=2-=- 222-22 sae 
Methyl ester of p-hydroxy 
Wc benzoic acid 0.2 gram. Gate eeee nee 
Water 5 ec____ 
Carbon tetrachloride 2 cc_____ 
4 Many of the preparations employed were obtained from Kahlbaum, and we are greatly 
indebted to Mr. José I. del Rosario of this laboratory for the preparation and purification 
of a number of duplicate specimens of the hydroxy benzoic acids and their esters. 
