166 FRANK R. LILLIE AND E. E. JUST. 



CURVE 5. The September run, 1911. 



CURVE 6. The June run, 1912. The part of the curve to the left is the end of 

 the June run as indicated by the arrow at the extreme right, and by the second i ow 

 of dates which refer to this part of the curve (see footnote, p. 154). 



