. 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. 17. Do not look into the hole to see about the eruption. It will generallyoccur in a minute or less after the acid is poured in. If it does 38 Intermediate Molding in Sand. not go, put in more acid. A very little cold water, added to theacid just before it is used, will generally expedite matters. Trya little of the mixture in a shovel before you build a volcano, andthe acid can thus be adjusted. With 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. 17. Do not look into the hole to see about the eruption. It will generallyoccur in a minute or less after the acid is poured in. If it does 38 Intermediate Molding in Sand. not go, put in more acid. A very little cold water, added to theacid just before it is used, will generally expedite matters. Trya little of the mixture in a shovel before you build a volcano, andthe acid can thus be adjusted. With the ordinary commercialsulphuric acid, however, no trouble should be the acid is too strong, and should be diluted by pour-ing some of the acid into a small quantity of water. Intermediate Molding in Sand, 39. iScKi* Fig. i8. Volcanoes.—II. Vesuvius, 79. Model upon the molding-board the details of Vesuvius and itssurroundings, including the bay of Naples and the Islands Ischiaand Procida. After the volcano has been prepared according tothe plan before given, mold the ridge S, of Mount Somma thecompanion peak as seen from Naples (N). Pieces of blue stringmay be laid to represent the streams upon which Naples andsome of the other towns are situated (Fig. 18). Naples may berepresented by a square of colored paper, and the buried citiesPompeii and Herculaneum by stars or triangles cut from paperof a different color. The modeHng should be done while the at-tention of the class is held at each point, the teacher placing thepieces of paper in position, or allowing the children to place themaccording to instructions. Following will be the lesson some-what in detail: 40 Intermediate Molding in Sand, The teacher asks questions about the shape of volcanoes, anddevelops the difference between mo
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Keywords: ., bookcentury1800, bookdecade1890, bookidmapmodelingi, bookyear1894
