History 57 Description and travel 32 Masses 22 Mathematics 22 Operas 21 Orchestral music 16 Symphonies 15 tuilleadh ... Organ music 13 Politics and government 13 Chemistry 9 History and criticism 9 Discovery and exploration 8 Concertos (Piano) 7 Architecture, Modern 6 Criticism and interpretation 6 Functions 6 String quartets 6 Choruses, Sacred (Mixed voices) with instrumental ensemble 5 Indians of North America 5 Songs with piano 5 Calculus 4 Choruses, Secular (Mixed voices, 4 parts), Unaccompanied 4 Curves, Algebraic 4 Lute music 4 Oratorios 4 Social conditions 4 Sonatas (Piano, 4 hands) 4 Songs (High voice) with piano 4 Suites (Orchestra) 4 Algebra 3 lúide ...