20 



The University of New Hampshire [Bulletin 338 



Daily and weekly averages of temperature were also computed in 

 the same manner as for humidity. The barometric pressure data was 

 obtained from the official weather records recorded at the Durham 

 station twice daily, at 8 a.m. and 5 p.m. These reports were averaged 

 to give a daily figure for use on the curves. 



In Figure 1 is illustrated (1) average moisture content of plot 

 house litter samples, (2) average moisture content of poultry pen 

 litter samples, (3) poultry pen air humidity, and (4) effect of new lit- 

 ter additions on litter moisture content. A review of this chart in- 



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Fig. 1. Effect of new litter additions to poultry pens on litter moisture 

 content. nos. 11-18, poultry pens. nos. 21-29, plot house. 



dicates that the litter moisture in the plot house samples started out 

 at a fairly low level (10 to 18 per cent) and gradually declined in all 

 litters throughout the experimental period to an average of about 

 10 per cent on May 23, 



