I am a piece of white paper, which has been steeped in water, so that the fibres of t

I am a piece of white paper, which has been steeped in water, so that the fibres of the wood are swelled, and are become soft and pliable. I am an excellent friend to the learned, for I enable them to write their thoughts in a fluid, which will presently become hard and firm, so that the paper may be preserved from corruption. I am also serviceable to the unlearned, for I soak into their bones, and render them flexible, so that