Monday, March 16, 2015

Another job you wouldn't want to do: testing scratch hardness

J.E. Hansen (Editor).  A Manual of Porcelain Enameling.  Published for the Ferro Enamel Corporation by The Enamelist Publishing Company, 1937.
"It's going to be another long day," sighed Murray. 

1 comment:

Mister G said...

Looks like a hard job...