Mellotronists

I haven't scoured everyone's responses, so pardon any duplicate buzzer-
beating answers:

Saucerful of Secrets - "Celestial Voices" section of title track, "See-
Saw" (Mk II 3 violins)

Singles - "Julia Dream", "Embryo" (Mk II flute)

Atom Heart Mother - title track (Mk II 3 violins, Mk II flute, Mk II 
brass or saxophone, maybe in there?)

Ummagumma - "Grand Vizor's Garden Party" (Mk II flute), "Sisyphus" (Mk 
II 3 violins, and I think flute and brass, but I haven't played that 
record in years)