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Describes the stones used in the Assyrian sculptures. Inscriptions of Sennacherib; Type of limestone of special quality; Geological map of the Judi Dagh.

In the course of investigating differences between results obtained for the analysis of chrysotile in airborne dust samples by TEM and by XRD, it has been established by EDXA and electron diffraction that the source dusts contain (in addition to chrysotile) particles of the non-asbestiform serpentine polymorphs, antigorite and probably lizardite. These appear to be present in sufficient quantities to cause significant interference with the 002 and 004 reflections of chrysotile, leading to serious over-estimation of the chrysotile content of samples, when using conventional X-ray diffractometer geometry. [ABSTRACT FROM PUBLISHER]

A direct transfer technique which allows samples of airborne dust collected on membrane filters (Millipore MF-series) to be transferred to TEM grids for estimation of asbestos content is described. The technique has been shown by direct observation to give quantitative transfer with no apparent fibre breakage. It has also been demonstrated that the overall procedure for estimation of fibre mass on the filter gives acceptable accuracy for analysis of standard samples. Sample preparation and analysis require approximately 1 man-day per sample with a total processing period of less than 1 week. [ABSTRACT FROM PUBLISHER]