164 STERILIZATION AND DISINFECTION 
TaBLE XVIII 
SHOWING THE PHENOL COEFFICIENTS OF SOME COMMON 
DISINFECTANTS 
(McClintic, 1912) 
Name of Disinfectant. With Organic Without Organic 
atter. atter. 
Bacterol.. 0... ee cee eee eee eee eee 1.34 1.58 
Benetol. 0... eee eee ee eee e ee 0.92 1.23 
Cabot’s silpho-naphthol................. 0.020005. 2.33 3.87 
Carbolene.. 0... 0. ccc eee eee e eee en nees 0.65 1.36 
Carbolozone....... 2... cee ee eee cee cece e neces 0.48 1.48 
Car-sul.. 0... cc cee cece nee e eens 1.75 2.00 
Chloro-naphtholeum ..,.......0. 0.000 c cence ees 3.21 6.06 
Cremoline.. 0.0... 0. ccc eee ee ence eee eeees 0.69 1.26 
Creo-carboline. .. 2.0... ce cee eee eens 2.26 4.03 
Creolin-Pearson 0.0... 0.00. cece cece eee een eee 2.52 3.25 
Cresoleum.. 2.0.0... 0... e cece eee cece eee e ee eeneee 1.75 2.90 
Crude carbolic acid... 0.0... ccc ee ee eee 2.63 2.75 
Dusenberry’s liquid creoleum ..............0.0005 0.40 1.00 
Germol.... 0... cence eee ne eeee 1.79 2.12 
Hycol.. ccc cece teen ees 9.37 12.30 
Kreosota.... 0.06. ccc cee eee cece een e ete nena 0.65 1.26 
Krreotas. . 0... ene cee een eeeeee 0.30 1.10 
Kreso.. oc een een cece e eee e eens 2.32 3.92 
Kresolig.. 0.0... ccc ce cee ee ee ee ees 1.48 2.13 
Liquor cresolis compositus (U.S. P.)............... 1.87 3.00 
1c) 1.57 2.12 
Phenoco disinfecting fluid................ 0.00000. 9.86 5.00 
Saponified cresol... 0.0... 0. ccc cee ee eee eee 0.57 1.03 
Tarola. oo. ec eee eee eee tee ee eeee 1.93 3.12 
Trikresol. 0... cc ee eee ee ewe eee ees 2.50 2.62 
Lay 0) 1.57 2.37 
Creola disinfectant... 0.0... 0c. ccc cece eee eee 52 
fall directly into the disinfectant solutions, one cylinder for each time 
interval selected; (8) note the temperature of the solutions (they should 
be kept at exactly 20° C. during the experiment); (9) note the time at 
which the cylinders were dropped into the disinfectant solutions; 
(10) at the end of stated intervals (usually at hourly intervals for pre- 
liminary tests) remove one cylinder from each solution with one of the 
sterile holders mentioned above, wash it thoroughly with sterile water, 
and remove a core from the center with a sterile piece of quill tubing 
(8-mm. bore); (11) place these cores in lactose fermentation tubes, 
after they are properly labeled, and incubate at 37° C. for several days, 
