XV.—BINOMIAL DISTRIBUTION AND NORMAL CURVE. 297 
indefinitely, though it will be found difficult to maintain any 
high degree of accuracy after the first few constructions. 
#] 
3 Nan hh 2 
: $ 3 aT 
0 0 ~N a ; 2 - 
5. The mechanical method of constructing the representation of 
a binomial series is indicated diagrammatically by fig. 48. The