. School: a monthly record of educational thought and progress. the Kelvin into oblongs, gives one hexagonal faceundistorted. We have now introduced the pupil to isometric projection, which he should have littledifficulty in applying to the delineation of a largeportion of the models he has constructed or seen, ,to the case of the hexagonal section of the cube (Fig. 4).Other simple cases of orthographic projectioncould be given as the necessity for them arose. Ifthe pupils ideas and methods are thus gradually deve-loped as they arise from wants felt in his practicalwork, he will enter the
. School: a monthly record of educational thought and progress. the Kelvin into oblongs, gives one hexagonal faceundistorted. We have now introduced the pupil to isometric projection, which he should have littledifficulty in applying to the delineation of a largeportion of the models he has constructed or seen, ,to the case of the hexagonal section of the cube (Fig. 4).Other simple cases of orthographic projectioncould be given as the necessity for them arose. Ifthe pupils ideas and methods are thus gradually deve-loped as they arise from wants felt in his practicalwork, he will enter the classes of the drawing master with some power of appreciating the principles on which Fig. 4. the rules of Descriptive Geometry* rest, projectingand rahatting having become familiar processes. The transition to Perspective is natural. He willnotice that the pictures in the illustrated cataloguewe have supposed him to be making, though givingenough information for construction and some notionof the appearance, do not quite represent the formsof the solids as actually seen. A little experimental * The sooner this province and that of perspective are lookedupon as belonging to the territory of mathematical master and thesooner the mathematical master qualifies himself to administerthem, the better for mathematical progress. work with a solid cube seen through a transparentscreen will enable him to draw a cube in perspectivein the simpler positions. When the cube has beenmastered, many of its derivatives are easily zeal of the scholar may be whetted by a judicioususe of the stereoscope.* He will soon understandthat the instrument combines two views of the samesolid fro
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