HYGIENIC PROTECTIVE SUGGESTIONS. 



any, are entirely destroyed by freezing. They 

 usually thaw out and again renew their ac- 

 tivities. Typhoid fever germs live all winter 

 in pond ice and in the spring and following 

 summer are just as powerful as ever to spread 

 infection. 



Rest and Sleep. — Do not sleep or rest in a 

 stuffy, dusty, badly ventilated room. Remem- sieepta?Rooms. 

 ber to have between two and three thousand 

 cubic feet of fresh air in all your sleeping rooms 

 as well as in sick-rooms. This amount of air 

 we have already said, when speaking of "com- 

 municable diseases," is found in a room twenty 

 feet long by fifteen feet wide with a ceiling ele- 

 vation of ten feet, provided the current of air 

 is changed frequently to keep it pure. The 

 windows should always be open at the top and 

 to aid in the regular changing of impure for 

 pure air, open them up from the bottom for a 

 while every day and open the doors also. Do 

 not open your windows several inches higher 

 than your window screens in hot weathet, or 

 remove the screens, thus admitting flies, etc. 

 Pick up a common house fly and examine it 

 under the microscope. The common house fly 

 has come to be called "the typhoid fly." When 

 you see the numberless pathogenic bacteria on 

 its feet you will not make this mistake again. 

 Do not rest or sleep in a current of air. It is an 

 injurious habit for even the most vigorous. 

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