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2017-01-08 Archaeology - Stone axe?:

Hi Jim,    This is a very odd object and is not typical of ground stone tools like an axe.  While it does have "sharp edges", the configuration or shape does not lend itself to being halted.  It may be

2017-01-08 Archaeology - Stone axe?:

Hi Jim,    It is an odd item.  Could you take three more photos of this object?  I need to see the two ends and a view from above with the object standing on edge.  Also please include a tape measure or

2016-12-31 Metallurgy - Stainless steel:

Precipitation-hardenable stainless steels are commonly heat treated so as to exhibit peak hardness and strength for instance by a one-hour heat treatment at 480 degrees Celsius. A shorter time or a lower


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