Table 1. Concentration distribution data for Vs = 0.035 foot per second, 
amplitude > 0.693 foot. 
Slope, Variance in 
d(1nC)/d|least squares Remarks 
(Eta) curve 
-5.60 0.0182 optics 
-7.99 0.0184 stationary 
-11.28 0.0196 
-13.91 0.0236 
-15.39 0.0136 
optics 
stationary 
optics 
stationary 
optics 
moving 
optics 
moving 
optics 
moving 
optics 
moving 
optics 
moving 
Not calculated. 
27 
