To see the working one:

testXSLT -IN TestNumber.xml -OUT TestNumberOut.xml -XSL WorksUseConvertSciToNumString.xsl

To see the "busted" one:

testXSLT -IN TestNumber.xml -OUT TestNumberOut.xml -XSL UseConvertSciToNumString.xsl


which use 

ConvertSciToNumString.xsl and WorksConvertSciToNumString.xsl

respectively.
