Complex sentence: The effect in the 1830s was that the rapidly growing industrial cities were far outnumbered in the legislature, to the annoyance of businessmen and industrialists, and few immigrants or factor workers could vote, despite their growing numbers.
Split into simpler sentences: The effect in the 1830s was that the rapidly growing industrial cities were far outnumbered in the legislature, to the annoyance of businessmen and industrialists. Furthermore few immigrants or factory workers could vote, despite their growing numbers.