DISINFECTION AND STERILIZATION. 177 
ants throwing garbage down air-shafts it is sometimes 
advisable to put wire netting outside of windows open- 
ing on shafts. Concrete or asphalt bottoms of shafts 
should be cleaned and washed with the bichloride solu- 
tion or sprinkled with chloride of lime. 
7. Hydrant Sinks, Garbage Receptacles, and Garbage 
and Oyster-shell Shutes and Receptacles should be 
cleaned daily and sprinkled with dry chloride of lime. 
8. Refrigerators and the Surfaces Around and Beneath 
Them, Dumb-waiters, etc., may be cleaned by scrubbing 
them with the hot soapsuds solution. 
9. Traps. All traps should be flushed daily with an 
abundance of water. If at any time they become foul 
they may be cleaned by pouring considerable quantities 
of the hot strong soda solution into them, followed by 
the carbolic solution. 
10. Urinals and the Floors Around and Underneath 
them should be cleaned twice daily with the hot soap- 
suds solution, and in addition to this, if offensive, they 
may be disinfected with the carbolic solution. 
11. Stable Floors and Manure Vaults. Stable floors 
should be kept clean and occasionally washed with the 
hot soapsuds or the hot strong soda solution, Pow- 
dered fresh chloride of lime or formalin may be used 
in manure vaults. 
12. Vacant Rooms should be frequently aired. 
13. The Woodwork in School-houses should be scrubbed 
weekly with hot soapsuds. This refers to floors, doors, 
door-handles, and all woodwork touched by the scholars’ 
hands. ; 
14. Spittoons in all Public Places should be emptied 
daily and washed with the hot soapsuds solution, after 
which a small quantity of the carbolic solution or milk 
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