Complex sentence: In the 1852 election, the borough constituencies of England elected 104 Ministerialists to parliament and 215 Oppositionists; while the (more rural) county constituencies of England elected 109 Ministerialists and only 32 Oppositionists.
Split into simpler sentences: In the 1852 election, the "boroughs" of England, itself, elected 104 Ministerialists to parliament while electing 215 Oppositionists. However, the counties of England elected 109 Ministerialists to parliament in the 1852 election while electing only 32 Oppositionists.