204 LEEUWENHOEK AND HIS “ LITTLE ANIMALS ”’ 
axis of Fig. F = 1 
axis of Fig. H = 10 
+ 
axis of Fig. D = 40 
12 
80 
40 
axis AG = 480 
480 
38400 
1920 
230400 
480 
18432000 
921600 
110592000 
However, when I took somewhat coarser sand, as I did 
when I drew up my estimate, I had to say that 20 axes 
of the foresaid | biggest] animalcules did but make up one 
axis of a sand-grain; and again, 5 axes of the lesser 
animalcule equalled the axis of the first; and further, 
10 axes of the smallest creature equalled one axis of the 
second. In fine, then, according to this calculation, a 
thousand million living animalcules are as big as a coarse 
sand-grain (taken from fine scouring sand). 
1 = axis F 
10 = axis E 
5 
50 = axis D 
20 
1000 = axis AG 
1000 
1000000 
1000 
1000000000 
