Complex sentence: By 1911, the towns textile industry was at the height of its prosperity, there were approximately 99,000 power looms in operation, and its population had grown from 4,000 (1801) to over 100,000.
Split into simpler sentences: By 1911, the town's textile industry was at the height of its prosperity, and there were approximately 99,000 power looms in operation. The town's population had grown from 4,000 (1801) to over 100,000.