Indian Central Cotton Committee Technological Laboratory The Weight per Inch of Fibres of Different Lenghts and the Numbers of Fibres of Different Lengths per Seed for each of the Standard Indian Cottons May 1930

The seed-weight and lint-weight per seed were determined for a weighed amount of hapas (seed-cotton) of each Indian cotton; the ginning percentage was then calculated; the lint was used for the determination of the percentage distribution of length by the Balls sorter and for the determination of the fibre-weight per centimetre as follows—By means of the Baer sorter fibres of different lengths w [...] First however it was necessary to arrange for the selection of the different lengths of fibre so that these could be tested separately for their4 The Weight per Inch and the Numbers of Fibres of Different Lengths fibre-weights; the method adopted was as follows—The remaining portion of the sliver of a given cotton used in the sledge sorter was placed across the combs of a Baer sorter and the [...] The procedure then is to apportion the total weight of lint per seed between the different group-lengths in accordance with the percentage of each present by weight as shown by the Balls sorter results; the fibre-weight per centimetre for each group-length is multiplied by the mean group-length to give the average weight of a whole fibre of that group-length; and finally the actual weight of lin [...] 2. The results for the variation are insignificant and in some cases irregular for the three cottons Umri Bani Nandyal 14 and Karunganni; but in the case of Mollisoni the fibre-weight per inch decreases rapidly as the fibre-length increases the differences of fibrweight for the finch and I-inch lengths amounting to 21 and 33% for 1926-27"The Weight per Inch and the Numbers of Fibres of Di [...] 4. The chief differences occur at the extreme ends of the curves where for the shorter fibres the frequency by number of fibres is about double the frequency by weight and for the longest fibres the frequency by number of fibres is decidedly less as a rule than the frequency by weight; in the region of the mode the difference in frequency is coparatively small.