Samuel Crompton’s Spinning Mule (1779) combined features from which two previous inventions?

Answer

The Spinning Jenny and the Water Frame.

Samuel Crompton’s 1779 invention combined the best features of the Jenny (multi-spool capacity) and the Water Frame (stronger thread production) using an intermittent process.

Samuel Crompton’s Spinning Mule (1779) combined features from which two previous inventions?
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