American School of Correspondence · Chicago, American school of correspondence · leaf 320
COTTON SPINNING 241 The whirl is driven on to the spindle, and the cup, which helpscenter and rotate the bobbin, is forced on to the sleeve of the whirl.The lower part of the bolster is covered with packing, tied with afine string. This gives greater steadiness to the running of thespindle and… … -BOLSTER. -PACKINQj
Textile industry and fabrics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-522-324.webp)
