378 MAN'S IMPROVEMENT OF HIS ENVIRONMENT 



and circulated through the air. Sweeping and dusting with dry 

 brooms or feather dusters only stirs up the dust, leaving it to settle 

 in some other place with its load of bacteria. Professor Hodge 

 tells of an experience in a school in Worcester, Mass. A health 

 brigade was formed among the children, whose duty was to clean 

 the rooms every morning by wiping all exposed surface with a damp 



A B 



The culture (A) was exposed to the air of a dirty street in the crowded part of 

 Manhattan. (B) was exposed to the air of a well-cleaned and watered street in 

 the uptown residence portion. Which culture has the more colonies of bac- 

 teria ? How do you account for this ? 



cloth. In a school of 425 pupils not a single case of contagious 

 diseases appeared during the entire year. Why not try this in 

 your own school ? 



Unselfishness the Motto. — Pupils should be unselfish in the 

 care of a school building. Papers and scraps dropped by some 

 careless boy or girl make unpleasant the surroundings for hundreds 

 of others. Chalk thrown by some mischievous boy and then 

 tramped underfoot may irritate the lungs of a hundred innocent 

 schoolmates. Colds or worse diseases may be spread through 

 the filthy habits of some boys who spit in the halls or on the 

 stairways. 



Lunch Time and Lunches. — If you bring your own lunch to 

 school, it should be clean, tasty, and well balanced as a ration. In 

 most large schools well-managed lunch rooms are part of the school 



