This particular passage comes from Gilbert and Sullivan's 'The Pirates of Penzance'. The verbiage is challenging and an excellent exercise in controlled speech which will greatly enhance your enunciation and force you to slow down and speak clearly.
'I am the very pattern of a modern Major-General; I've information vegetable, animal, and mineral; I know the Kings of England, and I quote the fights historical, From Marathon to Waterloo, in order categorical; I'm very well acquainted too with matters mathematical, I understand equations, both simple and quadratic, About binomial theorem I'm teeming with a lot o' news, With many cheerful facts about the square of the hypotenuse. I'm very good at integral and differential calculus, I know the scientific names of beings animalcules, In short, in matters vegetable, animal, and mineral, I am the very model of a modern Major-General.'