6084
60
32)365040
11407½
√11407 = 106.8 threads required.
The above may be proved correct by referring to the table of diameters. A plain cloth with 78 threads per inch of 32’s is “perfect,” and so is a plain cloth with 106½ threads per inch of 60’s.
The same principle must be employed if the warp and weft are of different counts, or if the threads per inch are not equal in warp and weft.
Example.—A sample cloth is made with 78 ends per inch of 32’s and 91 picks per inch of 44’s. How many picks will be required to keep the same firmness, if the weft only is changed to 60’s?
Counts in sample.
Counts in
proposed cloth.