page 75 note 2 A full account of this investigation will appear in ‘Studies in Conservation’, No. 2 (1953), Journal of the International Institute for the Conservation of Museum Objects (London, Thomas Nelson & Sons Ltd.)Google Scholar.
page 75 note 3 Tests that can be applied directly to the object, and that do not harm it in any way.
page 75 note 4 The items shown in the table are only a selection from a large number tested.
page 76 note 1 See Table.
page 77 note 1 Natural History, book xxxiii, chap. 46.