[21] The mule revolutionised cotton spinning by combining the roller drafting of Arkwright's water body With all the carriage drafting and spindle idea twisting of James Hargreaves's spinning jenny, generating a top quality yarn. Self-acting mules ended up used in Bolton mills right up until the 1960s making fine yarn.[21] https://archerzywuq.answerblogs.com/30693239/the-basic-principles-of-bolton-website-design