The metal in the gas-fired furnace is tested to check that it is properly melted. Depending on the alloy, this will be at about 1000 degrees C.
(Photo:Mary Stewart)
Test
Gordon Lochhead - Sculptor
No inside, no outside, no back, no front, just the right way up…or not
© Gordon Lochhead 2018. All photographs and text content on this site are by Gordon Lochhead, unless otherwise attributed.