to the project and its results.

SAMPLING PROCESS

 

Sample size

 

Neutron activation analysis requires at least a one-gram sample of powdered limestone to insure the homogeneity of the powder and produce a valid compositional profile of the sample.  Georgia Wright can provide specific directions for sampling to ensure that the results are useful. The holes produced are small and can be unobtrusive.

 

Close-up of typical sample holes:

 

 

Lore Holmes (foreground) and Garman Harbottle take a sample

:

 

 

Number of samples required for statistical analysis

 

Statistical analysis of compositional data attempts to find a match between the sample and museum objects, monument or region represented in the Limestone Database (presently comprising more than 2200 samples). 

 

To accomplish this, the sample is compared with a "reference group" of samples from a target area (e.g. the Cathedral at Reims or the Abbey of Moutiers-St-Jean).  A reference group optimally consists of approximately 25 or more samples from a group of sculptures or from masonry thought to be produced from stone from one stone source. The number of samples required depends on the question being asked; it should be discussed with Lore Holmes. 

 

For more information see Gesta 33/1 (1994), an issue devoted to the project and its results.

 

 

to be carved in stone from one stone source. The number of samples required depends on the question being asked; it should be discussed with Lore Holmes.  For more information see Gesta 33/1 (1994), an issue devoted to the project and its results.