The Farm Editor's answer continues: 'I have found it useful as material for filtering paper, and as admixture to the material for other kinds of paper.'
Please cite as “FVM-75-01-00,” in Correspondence of Ferdinand von Mueller, edited by R.W. Home, Thomas A. Darragh, A.M. Lucas, Sara Maroske, D.M. Sinkora†, J.H. Voigt† and Monika Wells accessed on 5 June 2025, https://epsilon.ac.uk/view/vonmueller/letters/75-01-00