Details

Titel

Societies and Academies

Ist Teil von

• Nature (London), 1931-10, Vol.128 (3234), p.733-735

Erscheinungsjahr

1931

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• LONDON. Society of Public Analysts, Oct. 7-J. Cecil Maby: The identification of wood and wood charcoal fragments. The economic and forensic importance of distinguishing between different woods by their microscopical structure is discussed, and the value of the method in archæological investigations is illustrated by various examples, such as the identification of the nature of the wood in the piles of lake dwellings, and of the charcoal from ancient furnaces.-T. Callan and N. Strafford: The examination of dyed leathers in cases of alleged dermatitis. The possibility of applying to dyed leather the tests used by Cox for the detection of diamines and allied bodies in fur has been investigated. The tannins in leather may interfere with many of these tests, but four of them will enable definite conclusions to be drawn, provided that control tests are applied to portions of the extract from the leather, after the addition of very small amounts of a meta- and para-diamine respectively.-W. L. Davies: The determination of chlorides in dairy products and biological material. The advantages of a wet (nitric acid) method are described, and suggestions for obtaining a sharper end-point in the titration of the excess of silver nitrate are made.