[166] “Aarb. for nordisk Oldkynd. og Historie,” 1891, p. 112.
[167] According to an analysis published by L. v. Barth in an account of the collection of papyri belonging to the Archduke Rainer, Part I. p. 120, the salt crystals, after removal of the insoluble constituents, consisted of:
| Potassium sulphate | 0·8% |
| Potassium and sodium chlorides | 92·0% |
| Calcium sulphate | 4·6% |
| Magnesium chloride | 2·8% |
| Organic substances | 0·2% |
[168] “Merkbuch,” p. 60.
[169] Communicated by Herr Leiner of Constance.
[170] “Antiquarisk Tidsskrift,” 1858-60, p. 176.
[171] Id., p. 174.
[172] Olshausen, “Verh. der Berl. anthropol. Ges.” 1885, p. 242, an oral communication from Herr v. Jenner.
[173] Attention may be drawn to a paper which (Dec. 1904) will shortly be published by the Imperial Commission for Monuments of Art and History in Vienna. At a meeting in Vienna a paper was given by Bolle on the animal enemies of paper, leather, and wood, and their destruction by means of carbon bisulphide. Carbon bisulphide is an infallible poison and has no effect upon colours when used in a perfectly dry state. This may be carried out by a preliminary displacement of the air by carbonic acid which is readily obtained in the liquid form in cylinders. Benzine would probably act equally well, but would require a longer time for its action. References to other methods such as the employment of a vacuum or of heat will be found in the same publication.
[174] Keim, “Technische Mittheilungen für Malerei,” 1888, p. 4.