. Map modeling in geography : including the use of sand, clay putty, paper pulp, plaster of Paris, and other materials : also chalk modeling in its adaptation to purposes of illustration. Fig. 82. aesson UK. Manufacturing. Many persons are engaged in farguing and 7ni7img, and nowwe should learn something about what other men do to supportthemselves and their families. In our last lesson we learnedsomething about the men who dig the coal. ^ They are calledminers. Georges father is a miner. The men who load thecoal are called helpers or simply laborers. Mules are used inhauling the coal along th
. Map modeling in geography : including the use of sand, clay putty, paper pulp, plaster of Paris, and other materials : also chalk modeling in its adaptation to purposes of illustration. Fig. 82. aesson UK. Manufacturing. Many persons are engaged in farguing and 7ni7img, and nowwe should learn something about what other men do to supportthemselves and their families. In our last lesson we learnedsomething about the men who dig the coal. ^ They are calledminers. Georges father is a miner. The men who load thecoal are called helpers or simply laborers. Mules are used inhauling the coal along the gangway. Not all of the roof iscalled Jiorseback. No, only that part which bulges into the coaland sometimes cuts off the layer. Name the common coal-products. (Review of previous work.) Tommy speaks of Coke. It is made just by burning coal. Tradesmen, 179 It isnt burnt up to ashes, but heated in large stone call that roasting the coal. Only the soft black bituminouscoal is used. * It is called coking coal^ because it forms is the most important of the bituminous coals, and the cokeis used as fuel in MAKING pig-iron and steel. When the coal isput into the ove
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