352 



POPULAB. SCIENCPJ MONTHLY. 



ber is double jacketed, and protected by asbestos-magnesia cov- 

 ering. The operations of the chamber are controlled by means 

 of a Foster valve. 



The interior of the disinfecting chamber has fixed rails for 

 the car to run upon, and is also fitted with a shield to protect 

 the contents of the car from damage by condensed moisture. 

 All water formed on the roof of the chamber drops from the 



shield into a receiving 

 pan, and can be drawn 

 off from there by a sepa- 

 rate connection. The 

 clothing treated is not 

 injured in any way. 



The discharging end 

 of the car opens into the 

 room where the health 

 officer controls the dis- 

 infecting system. This 

 end is fitted with a door 

 similar to the one al- 

 ready described. In op- 

 erating the chamber, one 

 door is closed first, and 

 steam admitted to the 

 jacket, and as much air 

 expelled by expansion as 

 possible before the sec- 

 ond door is closed. Then 

 the air is exhausted and 

 the vacuum process ef- 

 fects a thorough disin- 

 fection. 



The vacuum is pro- 

 duced by the siphon pro- 

 cess : steam under high 

 pressure is driven across 

 the end of a tube leading into the interior of the disinfecting 

 chamber. This tube is fitted with valves and cocks. The jacket 

 of the disinfecting chamber is fitted with separate valves and 

 cocks, and the temperature can be raised, if desired, without 

 admitting steam to the interior of the disinfecting chamber. 



The Wadsworth has but one boiler, but that is large for the 

 size of the boat. It supplies steam power to work the entire dis- 

 infecting system, as well as the power to run the boat's engines. 

 The top of the dome of the boiler is fitted with a pipe leading to 

 an extra dome ; this is the reservoir that supplies the super- 



SuLPiiuR Furnace. 



