126 MOSQUITOES 



yellow fovor prevails. All articles of personal apparel are 

 subjected to disinfection and, as everyone knows, durinj^ 

 a time when the fever is epidemic in any of our Southern 

 States even the mails are disinfected before being* allowed 

 to go North. There was further erected at C'amji Lazear 

 a small frame house with a cubic capacity of 2,800 feet, 

 tig-htly ceiled and battened, provided with small windows, 

 so as to prevent a thorough circulation of air through the 

 house, and with Avooden shutters to prevent the disinfect- 

 ing qualities of sunlight. The windows were closed by 

 l)erniauent wire screens with a 5-millimetre mesh. The 

 vestibule was protected by a solid door and a wire screen- 

 door, and the inner entrance by a second wire screen- 

 door. In this way the passage of mosquitoes into the 

 room was ettectuall}" excluded. The average temperature 

 Avas kept at 7G.2° F. for a period of sixty-three days, and 

 precaution was taken to maintain suthcient humidity of 

 the atmosphere. On November 30tli, three large boxes 

 tilled with sheets, pillowslips, blankets, and so on, con- 

 taminated by contact with cases of yellow fever and their 

 discharges, were received and placed in the room. Most 

 of these articles had been taken from the beds of i)atients 

 sick with yellow fever in Havana. Manj' of them had 

 been purposely soiled with the excretions of i)atients. 

 These soiled sheets, i)illowcases, and blankets were used 

 in preparing the beds in which the members of the hos- 

 pital corps slept. During sixty-three days this building, 

 thus furnished, was occupied by seven uon-immuue per- 

 sons. Three of them occupied the room each night for 

 twenty days. Later a fourth box of clothing and bed- 



