Charles A. Baird Missouri from 1921 until at least 1937, also acting as the President of the Board for several years. In his later years, Baird became a benefactor of the University of Michigan. His most prominent gift was the Charles Baird Carillon, a carillon consisting of 53 bells that was the third heaviest in the world in 1936. The carillon was purchased with a $70,000 gift from Baird. When Baird first offered the carillon to the university, the Burton Memorial Tower had not been built. The school initially set aside $35,000 to house the carillon in the tower of the Michigan Union.
Partition of a set "coarser" than "α"—if every element of "α" is a subset of some element of "ρ". Informally, this means that "α" is a further fragmentation of "ρ". In that case, it is written that "α" ≤ "ρ". This "finer-than" relation on the set of partitions of "X" is a partial order (so the notation "≤" is appropriate). Each set of elements has a least upper bound and a greatest lower bound, so that it forms a lattice, and more specifically (for partitions of a finite set) it is a geometric lattice. The "partition lattice" of a 4-element set has 15 elements