Page 7 - Front cover sm school.pub

The doors were blocked up with the bricks and sand and also the holes in the top of the kiln. Then the fires were started. The bricks were packed so that a small chimney was formed over a hole in the floor. The heat from the furnaces went up the sides and, as it could not get out at the top of it, it travelled down the chimney in The middle of the kiln, through a six foot tunnel and out of a tall chimney. The furnaces are stoked every hour, night and day for 84 hours until the temperature is several sharks teeth and a variety of stones. 1050 centigrade. After we had visited the gravel pit we came The temperature is controlled and registered back to the school feeling very fortunate to by means of three electrical points which have had such an interesting excursion. are attached to the roof of the kiln by wires. Don’t we just love this bull, and for those After we had seen the bricks being made who still yearn for our school days do you and baked we visited the pits. We noticed remember those science lessons where that the different sands and clays were in every experiment had to be described , layers. documented, and a conclusion had to be These were made by the melting and written, usually for homework, well this is freezing of the ice in the ice age. We found one of yours from 1940. 17