W. Palin Eldkrton 



269 



Fid. 3. Amoiint of Hickiifss and Niimber tif Dealhs aalten the Kxposcd to liluk ig ri'ijresciitrd hij the 



sinne Normal Curie. 



AjTCO 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 



• Sickness. Deaths. 



Each Square balf-inch = 200 weeks' sickness=160 deaths. The vertical lines taken in order from left 

 to right shew (1) axis of normal curve giving exposed to risk, (2) mean of deaths, (3) mode of deaths 

 coinciding to our scale with mean of sickness, (4) mode of sickness. 



