Indian Central Cotton Committee Technological Laboratory The Effect of Temperature and Humidity on Cotton Spinning with particular refernce to conditions in Bombay August 1927

The conclusions drawn from these tests are : (1) for comfort the normal conditions are more satisfactory than either of the extreme conditions ; (2) for workability of the material the medium-dry conditions are not quite satisfactory in the card room whereas the normal and monsoon conditions are satisfactory throughout ; the yarn spun under medium-dry conditions is the least satisfactory in app [...] This control however is in the direction of (1) increasing the temperature -except in so far as the abstraction of heat which results from increasing the relative humdity by the evaporation of water may lead to a reduction of temperature when the heating unit is out of action ; and (2) increasing the relative humidity except in so far as heating the air causes a reduction in relative humidi [...] when the spining conditions were to be changed the test bobbins of the sample on the ring frame for the old conditions had to be copletely spun before the sample for the new conditions was placed upon the card so that in the intervening period the preparation machinery remained idle.12 (3) Because of the acute discomfort to those working caused by spining under the monsoon conditions it [...] The differences for the Karunganni cotton have been traced to the fact that the original bulk of cotton from which all test samples were taken was not regular throughout and that the portion taken for one of the normal lots was actually stronger than the other and stronger than the portions taken for the medium-dry and monsoon tests. [...] The fact that the difference between the normal duplicate lots is in the same direction and of almost the same magnitude for each of the three counts itself suggests of course that the roving used for the one set of three counts was composed of stronger fibre than that used for the other set of three counts.