IJ rOL'U'RV DISKASES AND THEIR TREATMENT. 



tor cellars, brooder houses and all houses which can be readily 

 made air tight. For the benefit of those who wish to use the 

 method for such purposes the following directions are given. 

 Tliis will give a very strong fumigation and disinfection but such 

 is indicatetl about poultry establishments. 



"Formaldehyde Gas Disinfection: First make the room as 

 tight as possible by stoi)ping cracks, key-holes, etc., with pieces 

 of cloth or similar substance. Open drawers and doors of l)u- 

 reaus, wardrobes, and closets to allow free access of the gas. 

 Use a metal or carthern dish for a generator, of sufificient 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 lielow 50° F. and more effective disinfection 

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

 beginning. Sprinkle boiling water on the floor or place a kettle 

 01 boiling water in the room to create a moist atmosphere. 

 Spread the permanganate evenly over the bottom of the dish and 

 quickly pour in the formaldehyde (40 per cent strength as pur- 

 chased). Leave and tightly close the room at once and allow to 

 remain closed for 4-6 hours or longer, then air thoroughly." Use 

 <?5 ounces of permanganate and ? pints of formaldehyde to each 

 1000 cubic feet of space. 



For general disinfectant purposes about a poultry plant the 

 Station has found the cheapest and most effective disinfectant 

 to be compound cresol solution. This is used here for spraying 

 and disinfecting the houses after they are cleaned, disinfecting 

 brooders, brooder houses, incubators, nests and everything else 

 about the plant which can be disinfected with a liquid substance. 

 Any person can easily make this disinfectant. The following 

 revised directions for its manufacture are quoted from Bulletin 

 179 of this Station. 



Cresol Disinfectant. — Tl:e active base of cresol soap disinfect- 

 ing solution is commercial 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, there- 

 fore, in order to make satisfactory a dilute solution, it is neces- 

 sary first to incorporate the cresol with some substance like soap 

 which will mix with water and will carr\- tlie cresol over into 

 the mixture. The commercial cresol as it is obtained, is a cor- 

 rosive substance, being in this respect not unlike carbolic acid. 



