The notable features are the high ammonia content and low fat content 

 of the hot air-evaporated samples, and the high viscosity of the samples 

 taken directly from the vacuum evaporators. Interesting, even if non-sig- 

 nificant, is the lower ammonia content of the process samples compared to 

 the storage samples and the somewhat higher total ash of the hot-air- 

 evaporated samples. The averages for the ash content of two groups of 

 vacuum-evaporated sanqples sure nearly equal, while the average for the 

 four hot-air-evaporated samples is about 25 percent higher. There is a 

 temptation to ascribe this to the scrubbing action of the stickwater 

 spray on the hot-air stream, which would undoubtedly remove dust, ash, 

 etc., from the drying air. This may, indeed, have an effect, but the 

 range in total ash values from 5,5 to 13.0 for condensed solubles pro- 

 duced in vacuum evaporators makes it plain that other unknown sources of 

 variability in total ash content are involved. 



Effect of Month of Collection 



The month during which the samples were collected had no effect, and 

 none would be expected. All samples from the Southern areas were collected 

 during one trip, and only from the Chesapeake Bay area was a sufficient 

 number of samples obtained so that the possible effect of season might 

 have been developed. This effect, if any, was lost in averaging all samples 

 for a given month in the statistical analysis. 



- 12 - 



