14 BULLETIN 591, U. S. DEPARTMENT OF AGRICULTURE. 
ences between the percentages of total waste as found in the mill 
tests and the total waste found in the textile-school tests (see Tables 
II and IV) are so great that, unless these conditions are considered, 
the results are confusing. 
WEATHER CONDITIONS. 
Table VI gives the monthly averages of the maximum and of the 
minimum temperatures and the precipitation in Fall River, Mass., 
during the months of February, March, and April, and in Raleigh, 
N. C., during the months of May, June, and July, 1916, while the 
mill tests and the textile-school tests, respectively, were in progress. 
These averages were derived from reports of the Weather Bureau, 
which show the maximum and minimum temperatures and the 
precipitation for each day. 
TaBLE VI.—Average daily maximum and minimum outside temperatures and the total 
precipitation during the tests. 
Mill tests. Textile-school tests. 
Average | Average Average | Average 
Month. maxi | mini- | Total Month. maxi- | mini- Total 
mum: | mum precipi- mum mum precipi- 
temper- | temper- | tation. temper- | temper- | tation. 
3 ature. ature. ature ature. 
| 
Degrees. | Degrees. | Inches. Degrees. | Degrees. | Inches. 
February .....------ 31.0 20.4 5.144] Mayer ce=aeee ease 81.7 61.7 2.95 
Marche eet ise: 36. 2 23.8 Shdiidl| diGiS = ssccospoocasos 83. 2 64.0 el 
APT sree ae esa: < 50. 3 37.7 4.78 || July. 84.4 69.7 8. 09 
Average......- 39. 2 27.3 4. 56 Average.-.... 83.1 65.1 6. 07 
RELATIVE HUMIDITY. 
During the time the cotton was being manufactured humidifiers 
were regulated so as to maintain as nearly as possible a constant 
humidity, but in the picker rooms at the mill there were no humidi- 
fiers. In each room self-recording hygrometers were used, which 
made complete records night and day of moisture and temperature 
during the test while the various grades of cotton were in the course 
of manufacture. Table VII shows these results. 
