W. F. HaRVP^Y and a. l\r'KENDRICK 87 
Number of 
Bacteria 
Ingested 
Frequency Disteibution of Ledcocytes 
(1) Couplets and 
triplets counted 
as 2's and 3's 
(2) Couplets and 
triplets counted as 
single ingestion 
0 
1 
2 
3 
4 
a 
7 
8 
194 
244 
228 
150 
97 
60 
38 
20 
194 
271 
249 
146 
91 
57 
22 
2 
9 
10 
3 
3 
3 
2 
3 
3 
Means 
Standard 
Deviations 
2-20 
1-86 
2-00 
1-67 
Both distributions come under the head of Pearson's Type I and are given 
by the equations 
-39 0 1 2 3 4 5 6 7 8 9 10 
Nitmbei' of bacteria ingested. 
Fig. 4. Couplets and triplets counted as 2's and 3's. 
