. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . 300 1 to 6000 Mercuric iodide 1 to 40,000 1 to9 Potassium bromide 1 to 10 1 to 143 Potassium iodide . 1 to 10 1 to 25 Potassium permanganate 1 to 300 1 to 1000 Pure formaldehyde 1 to 25,000 1 to 333 Quinine sulphate . 1 to 800 1 to 107 Silver nitrate .... 1 to 12,500 1 to 2000 Sodium borate 1 tol4 1 to 200 Sodium chloride . 1 to6 1 to 10,000 Zinc chloride .... 1 to 500 1 to 20,000 Zinc sulphate .... 1 to 20 1 These figures are approximately correct, and represent the percentage of disinfectionrequi
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . 300 1 to 6000 Mercuric iodide 1 to 40,000 1 to9 Potassium bromide 1 to 10 1 to 143 Potassium iodide . 1 to 10 1 to 25 Potassium permanganate 1 to 300 1 to 1000 Pure formaldehyde 1 to 25,000 1 to 333 Quinine sulphate . 1 to 800 1 to 107 Silver nitrate .... 1 to 12,500 1 to 2000 Sodium borate 1 tol4 1 to 200 Sodium chloride . 1 to6 1 to 10,000 Zinc chloride .... 1 to 500 1 to 20,000 Zinc sulphate .... 1 to 20 1 These figures are approximately correct, and represent the percentage of disinfectionrequired to be added to a fluid containing considerable organic material, in order perma-nently to prevent any bacterial growth. Solutions of half the given strength will inhibitthe growth of most bacteria and prevent the growth of many varieties. STANDARDIZATION OF DISINFECTANTS 669 OOOOI 0!» IujtasjoiqQ ?ooe °% I[osaaoux OOZ o* Iaq^qdinsjaadoo ?OBZ 01 I auipoi JO JO spuofqoijj, ?OS 0% I OOZ 0% Iapixoiaduaaoipjtjj S lOO O rt lO oo lOO 50 (N^ CO rH o o3O O lOO lOO »o i-IC<3 r-l on. O o 03 O pq ^ S3 ^ e- P. B 3 0Ph o 3 ^1 c3 bll ^ ri a ? o3 o .CI El ap. 3o a? £ >>Q. ft a ?+- o ,D 0 r^ h-l pi S ^ O ?s £| -35ag -rt S I• p c3 o1=1 S^ -, CQ <S -13-t^ ga » P d CHAPTER LIII. PRACTICAL DISINFECTION AND STERILIZATION (HOUSE,PERSON, INSTRUMENTS, AND FOOD). STERILIZ-ATION OF MILK FOR FEEDING INFANTS. DISINFECTANTS AND METHODS OF DISINFECTION EMPLOYEDIN THE HOUSE AND SICK-ROOM. Disinfection and Disinfectants.—Sunlight, pure air, and cleanlinessare always very important agents in maintaining health and in protect-ing the body against many forms of illness. When, however, it becomesnecessary to guard against such special dangers as infectious materialfrom communicable diseases the additional protection of disinfectionshould be considered. Practical disinfection never affords completeprotection; and perfect cleanliness is better, even in the presence ofcontagious disease,
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