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I thought the 'frog' was there to make it easier to make hand moulded bricks. A wedge shape set in the base of the mould forced the clay into the corners when the right size lump of clay was just thrown in, without the brick maker (who was probably on piece rate) having to mess about tamping the clay into the corners of the mould to make a square brick.
It probably makes the bricks quicker to dry after moulding and easier to fire evenly as well.
It probably makes the bricks quicker to dry after moulding and easier to fire evenly as well.
My OED quotes:
Frog:8th meaning listed - Brickmaking
1876 Sir E Becket "Making bricks with a hollow in one or both faces which I have absurdly heard called a frog."
His is the first recorded written use of the word but the quote implies much earlier use!
Frog:8th meaning listed - Brickmaking
1876 Sir E Becket "Making bricks with a hollow in one or both faces which I have absurdly heard called a frog."
His is the first recorded written use of the word but the quote implies much earlier use!
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