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fire. Charcoal embérs are very satisfaetory for staring the 

 burning. The fumes are liberated and the building let remain 

 elosed for some hours. It is not employed as generally for disin- 

 feeting purposes at this time as it once was. 



However, probably the most extensive use to which sulfur 

 fumes may be put in Cuba is in the destruction of Bibijaguas. 

 By the aid of certain appliances the fumes are forced into the 

 eolonies and retained therein by elosing the mouth of the open- 

 ing. The accompanying illustration represents the machine 



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used by the Estación Agronómica, The so-called pot A is fitted 

 with a grate upon which charcoal is started burning and when 

 the charcoal is well ignited sulfur in the from of dust or sticks 

 is thrown upon it and the lid of the receptacle tightly elosed. 

 The pot is then placed over the mouth of the colony and by 

 means of the bellows, air is compressed above the fire which 

 sends the fumes downard into the tunnels of the nest. Por 

 small nests a few minutos pumping with the bellows is all that is 

 required. After the burroughs are filled the mouths are tamped 

 with earth. Results are more satisfaetory when the soil is moist ; 

 otherwiste the fumes escape through the numerous cracks. 



The machine described is by no means faultless, the princi- 

 pal defect being the ungainly size of the bellows. However it 

 does the work in a fairly satisfaetory manner. A machine is un 

 the market by which the air is compresed with a pump and is 



