[94] “Merkbuch,” p. 62.
[95] Flinders Petrie, “Archaeological Journal,” Part 45, 1888, p. 88.
[96] Zapon: for further information and references see Appendix.
[97] “Chemische Zeitschrift,” ii. 1903, p. 203.
[98] For particulars of the composition and action of Kessler’s Fluates (salts of Hydrofluosilicic acid) see H. Hauenstein, “Die kessler’schen Fluate” (2nd ed., Berlin, 1895). The depot is “H. Hauenstein, Berlin N. Reinickendorferstrasse, 2b.”
[99] Ger. Patent, No. 31032. The apparatus was one of those used in the moulding room of the Royal Museums for the impregnation of plaster moulds and casts.
[100] In applying the above test it is advisable to add one or two drops of nitric acid before the addition of the barium salt. In this case, too, should any other than distilled water be used for steeping, a preliminary examination should be made to determine the presence or absence of sulphates.
[101] [Pure hydrochloric acid is usually sold in two strengths. Concentrated acid has a strength of about 32%, whilst the “diluted hydrochloric acid” of the Pharmacopœia is about 10%. The former should therefore be diluted with about 15, the latter with about 4 volumes of water. Transl.]
[102] “Chemische Zeitschrift,” II. 1903, p. 761.
[103] [Lecythoi: slender narrow-necked painted vessels which were frequently burnt or buried with the dead; cp. Aristophanes, “Ecclesiazusae,” 996: