TYPHOID FEVER 



137 



appalling, and one medical officer, who is most particular in 

 regard to the sanitation of his bungalow and compound, told me 

 that in two days with six large glass traps he filled a stable 

 bucket with dead flies caught in his own kitchen and back 

 verandah. This will give some idea of their prevalence." 



The two following charts from Ainsworth's paper sufficiently 

 explain themselves. 



The fly prevalence was estimated in the following manner. 

 "A half-sheet of 'tangle foot' was placed in three different 

 kitchens and changed every twenty-four hours ; a count was 



Chart I, showing the total number of admissions for enteric fever to the Station 

 Hospitals, Poona and Kirkee, from Jan. ist, 1894, to the end of October, 1908, 

 and the total rainfall, from January ist, 1905, to the end of October, 1908. 



thereafter made and a daily average struck — a rough and ready 

 method, no doubt, but sufficiently accurate for practical purposes, 

 especially when I add that, at the height of the fly plague, over 

 700 were caught on a half-sheet of paper. Incidentally also, 

 two facts may be quoted, first, that the kitchens used were 

 supposed to be fly-proof, being elaborately protected by gauze ; 

 and, second, that the daily average of flies caught in the kitchen 

 of the Station Hospital, Poona, during the period the observations 

 were carried out (May to October) was thirty, whilst in the worst 

 of the three experimental kitchens it was just 200." Ainsworth 



