Complex sentence: Over this time he became increasingly involved in college administration and moved the physics department from the mail college to a purpose-built building in 1926 later known as the Horton Laboratory with the first floor housing botany.
Split into simpler sentences: Over this time he became increasingly involved in college administration. He moved the physics department from the main college building to a purpose-built building in 1926, later known as the Horton Laboratory, with the first floor housing botany.