what poem by ted hughes begins with the line, I have spent hundreds of hours staring at a float.?

It's from 'Poetry in the Making' - not a poem as such more a collection of odds and ends from Ted Hughes's work for the BBC in the early 1970's in which he talks about poetry and encourages the listener/reader to try and write their own poems, stories and even novels. As a book about writing it is equally well suited for creative writing classes and for literary criticism - a very good and interesting read.