[log in to unmask] writes:

<<  At Dell Corporation, we find that mortar analyses reports for mortars
that are 50 to 60 years old or less can be useful to the guy in the field. >>

Bryan, what are they useful for?  Solely for matching the existing mortar?
Or is there some larger diagnostic function?  And does your post indicate
that analysis of mortars older than half a century is not useful?

Christopher Gray (formerly known as Struck Joint)