Poultry Hygiene 17 



or earthen dish for a generator, of sufficient size so that the 

 liquid will not spatter or boil over on the floor, since the 

 permanganate will stain. The temperature of the room 

 should not be below 50° F. and more effective disinfection 

 will be obtained if the temperature is 80° F. or above at the 

 beginning. Sprinkle boiling w^ater on the floor or place a 

 kettle of boiling water in the room to create a moist atmos- 

 phere. Spread the permanganate evenly over the bottom 

 of the dish and quickly pour in the formaldehyde (40 per 

 cent strength as purchased). Leave and tightly close the 

 room at once and allow to remain closed for 4-6 hours or 

 longer, then air thoroughly. Use 23 ounces of permanganate 

 and 3 pints of formaldehyde to each 1000 cubic feet of space. 



Cresol disinfectant. — For a disinfectant of the coal-tar or 

 carbolic acid type, we have found a cheap and satisfactory 

 sort to be compound cresol solution. This may be used 

 alone or as a second spray following formalin for spraying 

 and disinfecting the houses after they are cleaned, disinfect- 

 ing brooders, brooder houses, incubators, nests and every- 

 thing else about the plant which can be disinfected with a 

 liquid substance. It is particularly effective against mites 

 and other insect pests. It has been very satisfactory in 

 disinfecting incubators between hatches. Any person can 

 easily make this disinfectant. The following directions for 

 its manufacture are quoted from Bulletin 179 of the Maine 

 Agricultural Experiment Station. 



The active base of cresol soap disinfecting solution is com- 

 mercial cresol. This is a thick, sirupy fluid, varying in color 

 in different lots from a nearly colorless fluid to a dark brown. 

 It does not mix readily with water, and, therefore, in order 

 to make satisfactory a dilute solution, it is necessary first 

 to incorporate the cresol with some substance like soap 

 which will mix with water and will carry the cresol over 

 into the mixture. The commercial cresol, as it is obtained, 



