Complex sentence: During most of the 19th century, Aylmer like much of the Outaouais was an important center for the wood industry and during that period several steam boats were built alongside the Deschenes Rapids and the Ottawa River across from Britannia.
Split into simpler sentences: During most of the 19th century, Aylmer, like much of the Outaouais, was an important center for the wood industry. During that period several steam boats were built alongside the Deschenes Rapids and the Ottawa River across from Britannia.