On July 30, the number of parasites per cubic centimeter in the 

 patient's peripheral circulation was calculated. In order to obtain 

 drops of blood of known volume, the method of collecting it and 

 estimating the number of parasites per cubic centimeter used b}' 

 Lathrop and Pratt was employed. Three equal-sized drops of 

 blood were taken every two hours, beginning at 10 a. m. and 

 ending at 6 a. m. on the following day. The average number of 

 parasites present was then determined by counting the stained 

 filaria on a mechanical stage. The following chart shoAvs the rise 

 and fall in the number of filaria per cubic centimeter present dur- 

 ing the different times of the day and night: 



pn 



AM 



\ 



Chart showing the rise and fall in the number of filaria in the patient's peripheral cirenla- 

 tion during different times of the day and night. The figures in the left-hand column 

 arbitrarily represent the number of filaria per cubit- centimeter of blood, while tho.se 

 within the ruled squares indicate the calculated number of filaria per cubic centimeter of 

 blood. 



Strong, (2) in 1901, reported the first case of infection in the 

 Philippine Islands with Filaria nodurna in a European who had 

 resided in Iloilo for two years. A differential count of the leuco- 

 cytes showed 3 per cent of eosinophiles. 



