54 THOMPSON YATES LABORATORIES REPORT 
The accompanying tables give our results at a glance. The second table gives the 
minimum strength of those disinfectants w^hich seem to act most satisfactorily. The price list is 
only approximately correct : — 
Table I 
Disinfectant. 
Strength. 
Action on fsces. 
When mixed. 
When unmixed. 
Perchloride of mercury 
I in I, GOG 
oporc- bearing rorms 
• 
Copious growth 
Formol 
I in 2G 
Carbolic acid 
I in 20 
Sterile 
Copious 
Iodic hydrarg. 
I in 4,GOG 
Spore-bearing forms 
Copious 
Chloros 
Undiluted 
Limited 
Limited 
Chinosol 
I in 6oG 
Sterile 
Copious 
Izal 
I in 200 
Spore-bearing forms 
Creolin 
I in 10 
Sterile 
Carbolic acid (crude) 
Undiluted 
Sterile 
Zinc chloride 
I In IG 
Copious growth 
Copper sulphate 
I in 2G 
Copious 
Boiling water 
Copious 
Sodium chloride 
I in IG 
Copious 
ChlorideofIime,i5%Cl. 
I in 10 
Copious 
„ 35%C1. 
I in 10 
Considerable 
Table II 
Minimum Strength of Six Solutions with Approximate Cost per Gallon 
Carbolic acid ... ... i in 20 ... ... is. 
Crude carbolic ... ... i in 40 ... ... 6d. 
Formol ... ... i in 40 ... ... is. 6d. 
Chinosol ... ... I in 600 ... ... is. 
Creolin ... ... i in 40 ... ... is. 6d. 
Mercuric chloride ... i in 500 ... ... gd. 
The above six solutions were tested with a typhoid stool, and all gave complete sterilization. 
The literature on the subject is small, at any rate from our special standpoint. 
Uffelmann* states that the mineral acids are the most active of all disinfectants, then corrosive 
sublimate, carbolic acid, etc. He points out the importance of the duration of the influence of 
the disinfectant upon the motions. He recommends sulphuric or hydrochloric acid diluted w^ith 
double the quantity of water, mixed in equal bulk with the faeces, and allowed to stand, in the 
case of the former acid, 2 hours, of the latter 12 hours. FooTEt comes to the following con- 
clusions—that the best disinfectants to use are corrosive sublimate with hydrochloric acid, corrosive 
sublimate with potassium permanganate, and the chloride of lime. He further states that 
« Uffelmann : 'Die Desinfection infectioser Darmentleef ungen,' f Foote : 'The Sterilization of Fasces.' 'Intern. Jour. Med. 
' Berl. klin. Woch.,' 1889, No. 25. Sciences,' Oct. 1889. 
