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Sulphuric Acid.

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—On triturating the fibre with the concentrated acid, it dissolves to a brownish-purple solution; on pouring this solution into water, a substance is precipitated in dark-brown flocks; when dried it has the following composition:

C 64·4
H 4·4
O 31·2

The solution yields on distillation furfural and acetic acid.

A Text-book of Paper-making

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