"martin" wrote in message
news
On 02 Dec 2003 09:00:03 GMT, (BridgeP) wrote:


I was taught that it is 'fogs up'. This is in the text books. It allows
more
mortar/brick. 'Frogs down' is the economy method - les mortar.

What's a frog in this context?
The indentation moulded into one face of a brick is known as the frog. I
have no idea why.

Franz