 This liquid was pumped through a pipe from Pilkington’s across the second to the site of the first.Boards were erected as moulds to hold the liquid until it dried and then moulds were built on top of these to allow more liquid to be placed on top.It has been suggested that the name came from a thick brown liquid oozing from the slag heaps shortly after the waste had been dumped that resembled Burgoo - a kind of porridge eaten in the 17th century by sailors.